#include <stdio.h>

int main() {
	char name[] = "---.chr";
	FILE * f;
	int i;
	int c;
	for (i = 0; i < 256; ++i) {
		sprintf(name, "%d.chr", i);
		f = fopen(name, "rb");
		if (NULL == f) {
                       fclose(f);
			printf("error opening: %s\n", name);
                       return 1;
		} else {
			c = fgetc(f);
			if (c != i) {
				fclose(f);
				printf("content not match: %s\n", name);
				return 1;
			}
			c = fgetc(f);
			if (EOF != c) {
                                fclose(f);
				printf("file:%s have more than 1 byte\n", name);
				return 1;
                        }
			fclose(f);
		}
	}
	
	return 0;

}