convert int and char into a string

Question

I have int x and char c. I want to make a new string called str as "x c"; so the int, a space, and the char.

So for example:

x = 5, c = 'k'

//concatenate int and char with a space in between.

so the line printf("%s", str) will print:

5 k

How do I do this in C code?

Lookup sprintf()/snprintf: `snprintf(str, sizeof str, "%d %c", x, c);` — P.P, Feb 16 '13 at 23:36
Do you just want to print the " " or do you need the string for other purposes? If the former, you should simply use `printf()` to do all the work for you. — Code-Apprentice, Feb 16 '13 at 23:39

score 3 · Accepted Answer · edited May 23 '17 at 12:18

Use sprintf or snprintf to avoid safety of your code to be built on assumption that your buffer will be always big enough:

char str[100];
sprintf(str, 100, "%d %c", x, c);

But in case the only purpose of str will be to be used it to with printf, then just printf directly:

printf("%d %c", x, c);

...just don't use itoa since "this function is not defined in ANSI-C and is not part of C++"

score 1 · Answer 2 · answered Feb 16 '13 at 23:39

1

char tmp[32]={0x0};
sprintf(tmp, "%d %c", x, c);
printf("%s\n", tmp);

or

printf("%d %c\n", x, c);

answered Feb 16 '13 at 23:39

jim mcnamara

score 1 · Answer 3 · answered Feb 16 '13 at 23:40

1

sprintf() can do what you want:

sprintf(str, "%d %c", x, c);

answered Feb 16 '13 at 23:40

score 1 · Answer 4 · answered Feb 16 '13 at 23:41

1

Since you want to print the information out, there is no reason (that I can see) to convert the data into a string first. Just print it out:

printf("%d %c", x, c);

answered Feb 16 '13 at 23:41

Code-Apprentice

4 Answers4