C/stdio.h/snprintf

    
//Header file:     #include <stdio.h>  
//Declaration:     int snprintf(char * restrict buf, size_t num, const char * restrict format, ...) 
#include <stdio.h>
int main ()
{
  char buffer [50];
  int n, a=5, b=3;
  n=snprintf (buffer, 5,"%d plus %d is %d", a, b, a+b);
  printf ("[%s] is a %d char long string\n",buffer,n);
  return 0;
}