match.c

#include <stdio.h>


char *match(char *smaller, char *bigger)
{
 char *addr, *smaddr;
  smaddr = smaller;
  for(; *bigger != 0; bigger++){
    if(*smaller == *bigger){
     addr = bigger;
     while(*smaller == *bigger){
       if(*(smaller+1) == 0)
          return(addr);
       if(*(bigger+1) == 0)
         return(0);
      smaller++; bigger++;
     } 
     smaller = smaddr;
   }
 }
 return 0;
}

int main(int argc, char **argv)
{
  char *s1, *s2, *chk;
  s1 = "Here is what I say for the METAL:"
         " Hello"/*METAL*/" World!";
  s2 = "Hello World";
  chk = match(s2, s1);
  printf("%s", chk);
  return 0;
}

OUTPUT:
Hello World!