luc095.c

Problem Statement

luc095.c

Write a program that can read a file and display its contents. The file name should be supplied as a command-line argument.

Source Code

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

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

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

    fp = fopen(argv[1], "r");
    if (fp == NULL)
    {
        printf("Error: Cannot open file '%s'\n", argv[1]);
        exit(2);
    }

    /* Read and display contents */
    while ((ch = fgetc(fp)) != EOF)
    {
        printf("%c", ch);
    }

    fclose(fp);
    return 0;
}

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● Author - Amit Dutta · Updated - 08 Feb 2026