How to Fill an array from user input C

Question

What would be the best way to fill an array from user input   Would a solution be showing a prompt message and then get the values from from the user

User · Answer

Try   array i    Convert ToDouble Console Readline       You might also want to use double TryParse   to make sure that the user didn t enter bogus text and handle that somehow

User · Answer

It made a lot more sense to add this as an answer to arin s code than to keep doing it in comments     1  Consider using decimal instead of double  It s more likely to give the answer the user expects  See http   pobox com  skeet csharp floatingpoint html and http   pobox com  skeet csharp decimal html for reasons why  Basically decimal works a lot closer to how humans think about numbers than double does  Double works more like how computers  naturally  think about numbers  which is why it s faster - but that s not relevant here   2  For user input  it s usually worth using a method which doesn t throw an exception on bad input - e g  decimal TryParse and int TryParse  These return a Boolean value to say whether or not the parse succeeded  and use an out parameter to give the result  If you haven t started learning about out parameters yet  it might be worth ignoring this point for the moment   3  It s only a little point  but I think it s wise to have braces round all  for   if   etc  bodies  so I d change this   for  int counter   0  counter  lt  6  counter        Console WriteLine   0 5  1 8    counter  array counter      to this   for  int counter   0  counter  lt  6  counter          Console WriteLine   0 5  1 8    counter  array counter        It makes the block clearer  and means you don t accidentally write   for  int counter   0  counter  lt  6  counter        Console WriteLine   0 5  1 8    counter  array counter        Console WriteLine  ----       This isn t part of the for loop    4  Your switch statement doesn t have a default case - so if the user types anything other than  yes  or  no  it will just ignore them and quit  You might want to have something like   bool keepGoing   true  while  keepGoing        switch  answer                case  yes               Console WriteLine                                                                 Console WriteLine  please enter the array index you wish to get the value of it                int index   Convert ToInt32 Console ReadLine                 Console WriteLine                                                                 Console WriteLine  The Value of the selected index is                 Console WriteLine array index                keepGoing   false              break           case  no               Console WriteLine                                                                 Console WriteLine  HAVE A NICE DAY SIR                keepGoing   false              break           default              Console WriteLine  Sorry  I didn t understand that  Please enter yes or no                break            5  When you ve started learning about LINQ  you might want to come back to this and replace your for loop which sums the input as just      Or decimal  of course  if you ve made the earlier selected change double sum   input Sum      Again  this is fairly advanced - don t worry about it for now

User · Answer

Try   array i    Convert ToDouble Console Readline       You might also want to use double TryParse   to make sure that the user didn t enter bogus text and handle that somehow

User · Answer

Could you clarify the question a bit   Are you trying to get a fixed number of answers from the user   What data type do you expect -- text  integers  floating-point decimal numbers   That makes a big difference   If you wanted  for instance  an array of integers  you could ask the user to enter them separated by spaces or commas  then use  string foo   Console ReadLine    string   tokens   foo Split       List lt int gt  nums   new List lt int gt     int oneNum  foreach string s in tokens        if Int32 TryParse s  out oneNum           nums Add oneNum       Of course  you don t necessarily have to go the extra step of converting to ints  but I thought it might help to show how you would

User · Answer

I ve done it finaly check it and if there is a better way tell me guys      static void Main                 double   array   new double 6           Console WriteLine  Please Sir Enter 6 Floating numbers            for  int i   0  i  lt  6  i                          array i    Convert ToDouble Console ReadLine                        double sum   0           foreach  double d in array                        sum    d                    double average   sum   6          Console WriteLine                                                             Console WriteLine  The Values you ve entered are            Console WriteLine   0  1 8     index    value            for  int counter   0  counter  lt  6  counter                Console WriteLine   0 5  1 8    counter  array counter            Console WriteLine                                                             Console WriteLine  The average is              Console WriteLine average           Console WriteLine                                                             Console WriteLine  would you like to search for a certain elemnt    enter yes or no             string answer   Console ReadLine            switch  answer                        case  yes                   Console WriteLine                                                                     Console WriteLine  please enter the array index you wish to get the value of it                    int index   Convert ToInt32 Console ReadLine                     Console WriteLine                                                                     Console WriteLine  The Value of the selected index is                     Console WriteLine array index                    break               case  no                   Console WriteLine                                                                     Console WriteLine  HAVE A NICE DAY SIR                    break

User · Answer

string   answer   new string 10   for int i   0 i lt answer length i          answer i   Console ReadLine

User · Answer

I ve done it finaly check it and if there is a better way tell me guys      static void Main                 double   array   new double 6           Console WriteLine  Please Sir Enter 6 Floating numbers            for  int i   0  i  lt  6  i                          array i    Convert ToDouble Console ReadLine                        double sum   0           foreach  double d in array                        sum    d                    double average   sum   6          Console WriteLine                                                             Console WriteLine  The Values you ve entered are            Console WriteLine   0  1 8     index    value            for  int counter   0  counter  lt  6  counter                Console WriteLine   0 5  1 8    counter  array counter            Console WriteLine                                                             Console WriteLine  The average is              Console WriteLine average           Console WriteLine                                                             Console WriteLine  would you like to search for a certain elemnt    enter yes or no             string answer   Console ReadLine            switch  answer                        case  yes                   Console WriteLine                                                                     Console WriteLine  please enter the array index you wish to get the value of it                    int index   Convert ToInt32 Console ReadLine                     Console WriteLine                                                                     Console WriteLine  The Value of the selected index is                     Console WriteLine array index                    break               case  no                   Console WriteLine                                                                     Console WriteLine  HAVE A NICE DAY SIR                    break

User · Answer

C  does not have a message box that will gather input  but you can use the Visual Basic input box instead   If you add a reference to  Microsoft Visual Basic  NET Runtime  and then insert   using Microsoft VisualBasic    You can do the following   List lt string gt  responses   new List lt string gt     string response        while   response   Interaction InputBox  Please enter your information                                            Window Title                                            Default Text                                           xPosition                                          yPosition   equals           responses Add response      responses ToArray

User · Answer

string   answer   new string 10   for int i   0 i lt answer length i          answer i   Console ReadLine

User · Answer

Try   array i    Convert ToDouble Console Readline       You might also want to use double TryParse   to make sure that the user didn t enter bogus text and handle that somehow

User · Answer

Could you clarify the question a bit   Are you trying to get a fixed number of answers from the user   What data type do you expect -- text  integers  floating-point decimal numbers   That makes a big difference   If you wanted  for instance  an array of integers  you could ask the user to enter them separated by spaces or commas  then use  string foo   Console ReadLine    string   tokens   foo Split       List lt int gt  nums   new List lt int gt     int oneNum  foreach string s in tokens        if Int32 TryParse s  out oneNum           nums Add oneNum       Of course  you don t necessarily have to go the extra step of converting to ints  but I thought it might help to show how you would

User · Answer

Add the input values to a List and when you are done use List ToArray   to get an array with the values

User · Answer

string   answer   new string 10   for int i   0 i lt answer length i          answer i   Console ReadLine

User · Answer

C  does not have a message box that will gather input  but you can use the Visual Basic input box instead   If you add a reference to  Microsoft Visual Basic  NET Runtime  and then insert   using Microsoft VisualBasic    You can do the following   List lt string gt  responses   new List lt string gt     string response        while   response   Interaction InputBox  Please enter your information                                            Window Title                                            Default Text                                           xPosition                                          yPosition   equals           responses Add response      responses ToArray

User · Answer

It made a lot more sense to add this as an answer to arin s code than to keep doing it in comments     1  Consider using decimal instead of double  It s more likely to give the answer the user expects  See http   pobox com  skeet csharp floatingpoint html and http   pobox com  skeet csharp decimal html for reasons why  Basically decimal works a lot closer to how humans think about numbers than double does  Double works more like how computers  naturally  think about numbers  which is why it s faster - but that s not relevant here   2  For user input  it s usually worth using a method which doesn t throw an exception on bad input - e g  decimal TryParse and int TryParse  These return a Boolean value to say whether or not the parse succeeded  and use an out parameter to give the result  If you haven t started learning about out parameters yet  it might be worth ignoring this point for the moment   3  It s only a little point  but I think it s wise to have braces round all  for   if   etc  bodies  so I d change this   for  int counter   0  counter  lt  6  counter        Console WriteLine   0 5  1 8    counter  array counter      to this   for  int counter   0  counter  lt  6  counter          Console WriteLine   0 5  1 8    counter  array counter        It makes the block clearer  and means you don t accidentally write   for  int counter   0  counter  lt  6  counter        Console WriteLine   0 5  1 8    counter  array counter        Console WriteLine  ----       This isn t part of the for loop    4  Your switch statement doesn t have a default case - so if the user types anything other than  yes  or  no  it will just ignore them and quit  You might want to have something like   bool keepGoing   true  while  keepGoing        switch  answer                case  yes               Console WriteLine                                                                 Console WriteLine  please enter the array index you wish to get the value of it                int index   Convert ToInt32 Console ReadLine                 Console WriteLine                                                                 Console WriteLine  The Value of the selected index is                 Console WriteLine array index                keepGoing   false              break           case  no               Console WriteLine                                                                 Console WriteLine  HAVE A NICE DAY SIR                keepGoing   false              break           default              Console WriteLine  Sorry  I didn t understand that  Please enter yes or no                break            5  When you ve started learning about LINQ  you might want to come back to this and replace your for loop which sums the input as just      Or decimal  of course  if you ve made the earlier selected change double sum   input Sum      Again  this is fairly advanced - don t worry about it for now

User · Answer

C  does not have a message box that will gather input  but you can use the Visual Basic input box instead   If you add a reference to  Microsoft Visual Basic  NET Runtime  and then insert   using Microsoft VisualBasic    You can do the following   List lt string gt  responses   new List lt string gt     string response        while   response   Interaction InputBox  Please enter your information                                            Window Title                                            Default Text                                           xPosition                                          yPosition   equals           responses Add response      responses ToArray

User · Answer

Add the input values to a List and when you are done use List ToArray   to get an array with the values

User · Answer

string   answer   new string 10   for int i   0 i lt answer length i          answer i   Console ReadLine

User · Answer

C  does not have a message box that will gather input  but you can use the Visual Basic input box instead   If you add a reference to  Microsoft Visual Basic  NET Runtime  and then insert   using Microsoft VisualBasic    You can do the following   List lt string gt  responses   new List lt string gt     string response        while   response   Interaction InputBox  Please enter your information                                            Window Title                                            Default Text                                           xPosition                                          yPosition   equals           responses Add response      responses ToArray

User · Answer

It made a lot more sense to add this as an answer to arin s code than to keep doing it in comments     1  Consider using decimal instead of double  It s more likely to give the answer the user expects  See http   pobox com  skeet csharp floatingpoint html and http   pobox com  skeet csharp decimal html for reasons why  Basically decimal works a lot closer to how humans think about numbers than double does  Double works more like how computers  naturally  think about numbers  which is why it s faster - but that s not relevant here   2  For user input  it s usually worth using a method which doesn t throw an exception on bad input - e g  decimal TryParse and int TryParse  These return a Boolean value to say whether or not the parse succeeded  and use an out parameter to give the result  If you haven t started learning about out parameters yet  it might be worth ignoring this point for the moment   3  It s only a little point  but I think it s wise to have braces round all  for   if   etc  bodies  so I d change this   for  int counter   0  counter  lt  6  counter        Console WriteLine   0 5  1 8    counter  array counter      to this   for  int counter   0  counter  lt  6  counter          Console WriteLine   0 5  1 8    counter  array counter        It makes the block clearer  and means you don t accidentally write   for  int counter   0  counter  lt  6  counter        Console WriteLine   0 5  1 8    counter  array counter        Console WriteLine  ----       This isn t part of the for loop    4  Your switch statement doesn t have a default case - so if the user types anything other than  yes  or  no  it will just ignore them and quit  You might want to have something like   bool keepGoing   true  while  keepGoing        switch  answer                case  yes               Console WriteLine                                                                 Console WriteLine  please enter the array index you wish to get the value of it                int index   Convert ToInt32 Console ReadLine                 Console WriteLine                                                                 Console WriteLine  The Value of the selected index is                 Console WriteLine array index                keepGoing   false              break           case  no               Console WriteLine                                                                 Console WriteLine  HAVE A NICE DAY SIR                keepGoing   false              break           default              Console WriteLine  Sorry  I didn t understand that  Please enter yes or no                break            5  When you ve started learning about LINQ  you might want to come back to this and replace your for loop which sums the input as just      Or decimal  of course  if you ve made the earlier selected change double sum   input Sum      Again  this is fairly advanced - don t worry about it for now

User · Answer

I ve done it finaly check it and if there is a better way tell me guys      static void Main                 double   array   new double 6           Console WriteLine  Please Sir Enter 6 Floating numbers            for  int i   0  i  lt  6  i                          array i    Convert ToDouble Console ReadLine                        double sum   0           foreach  double d in array                        sum    d                    double average   sum   6          Console WriteLine                                                             Console WriteLine  The Values you ve entered are            Console WriteLine   0  1 8     index    value            for  int counter   0  counter  lt  6  counter                Console WriteLine   0 5  1 8    counter  array counter            Console WriteLine                                                             Console WriteLine  The average is              Console WriteLine average           Console WriteLine                                                             Console WriteLine  would you like to search for a certain elemnt    enter yes or no             string answer   Console ReadLine            switch  answer                        case  yes                   Console WriteLine                                                                     Console WriteLine  please enter the array index you wish to get the value of it                    int index   Convert ToInt32 Console ReadLine                     Console WriteLine                                                                     Console WriteLine  The Value of the selected index is                     Console WriteLine array index                    break               case  no                   Console WriteLine                                                                     Console WriteLine  HAVE A NICE DAY SIR                    break

User · Answer

readline is for string   just use read

User · Answer

Could you clarify the question a bit   Are you trying to get a fixed number of answers from the user   What data type do you expect -- text  integers  floating-point decimal numbers   That makes a big difference   If you wanted  for instance  an array of integers  you could ask the user to enter them separated by spaces or commas  then use  string foo   Console ReadLine    string   tokens   foo Split       List lt int gt  nums   new List lt int gt     int oneNum  foreach string s in tokens        if Int32 TryParse s  out oneNum           nums Add oneNum       Of course  you don t necessarily have to go the extra step of converting to ints  but I thought it might help to show how you would

User · Answer

Add the input values to a List and when you are done use List ToArray   to get an array with the values

User · Answer

of course    Console ReadLine always return string    so you have to convert type string to double  array i  double Parse Console ReadLine

User · Answer

Could you clarify the question a bit   Are you trying to get a fixed number of answers from the user   What data type do you expect -- text  integers  floating-point decimal numbers   That makes a big difference   If you wanted  for instance  an array of integers  you could ask the user to enter them separated by spaces or commas  then use  string foo   Console ReadLine    string   tokens   foo Split       List lt int gt  nums   new List lt int gt     int oneNum  foreach string s in tokens        if Int32 TryParse s  out oneNum           nums Add oneNum       Of course  you don t necessarily have to go the extra step of converting to ints  but I thought it might help to show how you would

User · Answer

Add the input values to a List and when you are done use List ToArray   to get an array with the values

User · Answer

Try   array i    Convert ToDouble Console Readline       You might also want to use double TryParse   to make sure that the user didn t enter bogus text and handle that somehow

User · Answer

of course    Console ReadLine always return string    so you have to convert type string to double  array i  double Parse Console ReadLine

User · Answer

readline is for string   just use read

User · Answer

It made a lot more sense to add this as an answer to arin s code than to keep doing it in comments     1  Consider using decimal instead of double  It s more likely to give the answer the user expects  See http   pobox com  skeet csharp floatingpoint html and http   pobox com  skeet csharp decimal html for reasons why  Basically decimal works a lot closer to how humans think about numbers than double does  Double works more like how computers  naturally  think about numbers  which is why it s faster - but that s not relevant here   2  For user input  it s usually worth using a method which doesn t throw an exception on bad input - e g  decimal TryParse and int TryParse  These return a Boolean value to say whether or not the parse succeeded  and use an out parameter to give the result  If you haven t started learning about out parameters yet  it might be worth ignoring this point for the moment   3  It s only a little point  but I think it s wise to have braces round all  for   if   etc  bodies  so I d change this   for  int counter   0  counter  lt  6  counter        Console WriteLine   0 5  1 8    counter  array counter      to this   for  int counter   0  counter  lt  6  counter          Console WriteLine   0 5  1 8    counter  array counter        It makes the block clearer  and means you don t accidentally write   for  int counter   0  counter  lt  6  counter        Console WriteLine   0 5  1 8    counter  array counter        Console WriteLine  ----       This isn t part of the for loop    4  Your switch statement doesn t have a default case - so if the user types anything other than  yes  or  no  it will just ignore them and quit  You might want to have something like   bool keepGoing   true  while  keepGoing        switch  answer                case  yes               Console WriteLine                                                                 Console WriteLine  please enter the array index you wish to get the value of it                int index   Convert ToInt32 Console ReadLine                 Console WriteLine                                                                 Console WriteLine  The Value of the selected index is                 Console WriteLine array index                keepGoing   false              break           case  no               Console WriteLine                                                                 Console WriteLine  HAVE A NICE DAY SIR                keepGoing   false              break           default              Console WriteLine  Sorry  I didn t understand that  Please enter yes or no                break            5  When you ve started learning about LINQ  you might want to come back to this and replace your for loop which sums the input as just      Or decimal  of course  if you ve made the earlier selected change double sum   input Sum      Again  this is fairly advanced - don t worry about it for now

User · Answer

I ve done it finaly check it and if there is a better way tell me guys      static void Main                 double   array   new double 6           Console WriteLine  Please Sir Enter 6 Floating numbers            for  int i   0  i  lt  6  i                          array i    Convert ToDouble Console ReadLine                        double sum   0           foreach  double d in array                        sum    d                    double average   sum   6          Console WriteLine                                                             Console WriteLine  The Values you ve entered are            Console WriteLine   0  1 8     index    value            for  int counter   0  counter  lt  6  counter                Console WriteLine   0 5  1 8    counter  array counter            Console WriteLine                                                             Console WriteLine  The average is              Console WriteLine average           Console WriteLine                                                             Console WriteLine  would you like to search for a certain elemnt    enter yes or no             string answer   Console ReadLine            switch  answer                        case  yes                   Console WriteLine                                                                     Console WriteLine  please enter the array index you wish to get the value of it                    int index   Convert ToInt32 Console ReadLine                     Console WriteLine                                                                     Console WriteLine  The Value of the selected index is                     Console WriteLine array index                    break               case  no                   Console WriteLine                                                                     Console WriteLine  HAVE A NICE DAY SIR                    break

[c#] How to Fill an array from user input C#?

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