Question

How to concatenate strings in C, not like 1 + 1 = 2 but like 1 + 1 = 11.

Answer 1

I think you need string concatenation:

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

int main() {
  char str1[50] = "Hello ";
  char str2[] = "World";

  strcat(str1, str2);

  printf("str1: %s\n", str1);

  return 0;
}

from: http://irc.essex.ac.uk/www.iota-six.co.uk/c/g6_strcat_strncat.asp