Mine

int main(int argc, char *argv[]) {  FILE *fp1, *fp2;  if(argc!=3) {    printf("Usage: compare <file 1> <file 2>\n");    exit(1);  }  if((fp1 = fopen(argv[1], "rb"))==NULL) {    printf("Cannot open first file.\n");    exit(1);  }  if((fp2 = fopen(argv [2], "rb"))==NULL) {    printf("Cannot open second file.\n");    exit(1);  }.....................}