#include <stdio.h>

int main(int argc, const char **argv)
{
    if (argc < 2) {
        fprintf(stderr, "Usage: %s <file>\n", argv[0]);
        return -1;
    }

    FILE *fp = fopen(argv[1], "r");
    if (!fp) {
        fprintf(stderr, "cannot open %s\n", argv[1]);
        return -1;
    }

    char c;
    while ((c = fgetc(fp)) != EOF) {
        fputc(c, stdout);
    }

    fflush(stdout);

    return 0;
}