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#include <stdio.h>
#include <stdlib.h>
main(int argc, char *argv[])
    for (i = 1; i < argc; i++) {
        FILE *f;
        int c;
        f = fopen(argv[i], "r");
        if (!f) {
            perror(argv[i]);
            exit(1);
        while ((c = fgetc(f)) != EOF) {
            if (putchar(c) < 0) exit(1);
        fclose(f);
    exit(0);