如何将单个字符转换为strlen = 1的char *？

Question

I've trying to do this but I can't find the right way. I have this :

#include <string.h>
#include <stdio.h>

int main(){
  char a = 'a';
  char b[1] = " ";
  strcat(b,a);
  printf ("%s",b);
  return 0;
}

I know it's wrong. How can I fix this code in order to turn 'a' into "a" ?

Answer 1

#include <string.h>
#include <stdio.h>

int main(){
    char a = 'a';
    char b[2] = " ";
    b[0] = a;
    printf ("%s",b);
    return 0;
}

A c string is just an array of characters - if you want to set individual characters in that string, you can do so exactly as you would any other array.

One thing you missed though is that c strings have to be 1 longer than the number of characters you want to store - to store the terminating \\0 .