How do I properly printf an integer and a string in C

Question

I have the following code   char  s1   s2  char str 10    printf  Type a string      scanf   s   str    s1    amp str 0   s2    amp str 2    printf   s n   s1   printf   s n   s2     When I run the code  and enter the input  A 1  as follow   Type a string  A 1   I got the following result   A   lt     I m trying to read the first character as a string and the third character as an integer  and then print those out on the screen  The first character always works  but the screen would just display random stuffs after that     How should I fix it

User · Answer

You re on the right track  Here s a corrected version   char str 10   int n   printf  type a string      scanf   s  d   str   amp n    printf   s n   str   printf   d n   n     Let s talk through the changes    allocate an int  n  to store your number in tell scanf to read in first a string and then a number   d means number  as you already knew from your printf   That s pretty much all there is to it  Your code is a little bit dangerous  still  because any user input that s longer than 9 characters will overflow str and start trampling your stack

User · Answer

Try this code my friend      include lt stdio h gt  int main       char  s1   s2     char str 10       printf  type a string         scanf   s   str       s1    amp str 0      s2    amp str 2       printf   c n    s1       use  c instead of  s and  s1 which is the content of position 1    printf   c n    s2       use  c instead of  s and  s3 which is the content of position 1     return 0

User · Answer

scanf   s  str  scans only until it finds a whitespace character  With the input  A 1   it will scan only the first character  hence s2 points at the garbage that happened to be in str  since that array wasn t initialised

[c] How do I properly 'printf' an integer and a string in C?

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