//$gcc fcat.c
//$./a.out fcat.c
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[]) {
    FILE *fp;
    int ch;

    // Check if filename is provided
    if (argc != 2) {
        printf("Usage: %s <filename>\n", argv[0]);
        return 1;
    }

    // Open the file in read mode
    fp = fopen(argv[1], "r");
    if (fp == NULL) {
        perror("Error opening file");
        return 1;
    }

    // Read and print each character until EOF
    while ((ch = fgetc(fp)) != EOF) {
        putchar(ch);
    }

    // Close the file
    fclose(fp);

    return 0;
}