C - casting int to char and append char to char

Question

I am making my first parallel application  but I am stuck with basics of C  I need to know  how to cast int to char and then how to append one char to another    It you could help me please  i would be glad  Thank you

User · Accepted Answer

You can use itoa function to convert the integer to a string.

You can use strcat function to append characters in a string at the end of another string.

If you want to convert a integer to a character, just do the following -

int a = 65;
char c = (char) a;

Note that since characters are smaller in size than integer, this casting may cause a loss of data. It's better to declare the character variable as unsigned in this case (though you may still lose data).

To do a light reading about type conversion, go here.

If you are still having trouble, comment on this answer.

Edit

Go here for a more suitable example of joining characters.

Also some more useful link is given below -

Second Edit

char msg[200];
int msgLength;
char rankString[200];

........... // Your message has arrived
msgLength = strlen(msg);
itoa(rank, rankString, 10); // I have assumed rank is the integer variable containing the rank id

strncat( msg, rankString, (200 - msgLength) );  // msg now contains previous msg + id

// You may loose some portion of id if message length + id string length is greater than 200

Third Edit

Go to this link. Here you will find an implementation of itoa. Use that instead.

User · Answer

int i   100  char c    char i    There is no way to append one char to another  But you can create an array of chars and use it

User · Answer

int myInt   65   char myChar    char myInt      myChar should now be the letter A  char 20  myString    0      make an empty string   myString 0    myChar  myString 1    myChar     Now myString is  AA    This should all be found in any intro to C book  or by some basic online searching

User · Answer

Casting int to char involves losing data and the compiler will probably warn you   Extracting a particular byte from an int sounds more reasonable and can be done like this   number  amp  0x000000ff     first byte     number  amp  0x0000ff00   gt  gt  8     second byte     number  amp  0x00ff0000   gt  gt  16     third byte     number  amp  0xff000000   gt  gt  24     fourth byte

User · Answer

Casting int to char is done simply by assigning with the type in parenthesis   int i   65535  char c    char i    Note  I thought that you might be losing data  as in the example   because the type sizes are different   Appending characters to characters cannot be done  unless you mean arithmetics  then it s simple operators   You need to use strings  AKA arrays of characters  and  lt string h gt  functions like strcat or sprintf

[c] C - casting int to char and append char to char

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