How to concatenate string and int in C?

Question

I need to form a string, inside each iteration of the loop, which contains the loop index i:

for(i=0;i<100;i++) {
  // Shown in java-like cod         


        

Answer 1

Strings are hard work in C.

#include 

int main()
{
   int i;
   char buf[12];

   for (i = 0; i < 100; i++) {
      snprintf(buf, 12, "pre_%d_suff", i); // puts string into buffer
      printf("%s\n", buf); // outputs so you can see it
   }
}

The 12 is enough bytes to store the text "pre_", the text "_suff", a string of up to two characters ("99") and the NULL terminator that goes on the end of C string buffers.

This will tell you how to use snprintf, but I suggest a good C book!