hex.c

hex.c

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[]) {
	if (argc != 2) {
		return -1;
	}

	FILE *reader = fopen(argv[1], "r");
	int c = fgetc(reader);
	while (c != EOF) {
		printf("%X ", c);
		c = fgetc(reader);
	}
	
	return 0;
}

Print itself in hex
tcc -run hex.c hex.c