Call C library string match function

#include 
#include 
int ssFind(int n, char *txt, int m, char *pat)
{
  int nmatch = 0;
  char *cp;
  cp = txt;
  while (cp = strstr(cp, pat)) {
     printf("%d\n", cp-txt);
     nmatch++;
     cp++;
  }
  return(nmatch);
}
/* End of File */