Question

Write a simple C/C++ function named int match_content(char * file1, char *file2) that would take two text file name as a parameter, and return 1, if the content is same in both the files, 0 otherwise. Your program should be case insensitive and should support all the ascii characters.

Answer 1

#include <stdio.h>

int match_content(char * file1, char *file2) {
    FILE *f1 = fopen(file1, "r");
    FILE *f2 = fopen(file2, "r");
    if (f1 && f2) {
        char c1, c2;
        while ((c1 = (char)getc(f1)) != EOF && (c2 = (char)getc(f2)) != EOF) {
            if (c1 >= 'a' && c1 <= 'z') {
                c1 -= 32;
            }
            if (c2 >= 'a' && c2 <= 'z') {
                c2 -= 32;
            }
            if (c1 != c2) {
                return 0;
            }
        }
        return getc(f1) == EOF and getc(f2) == EOF;
    }
    return 0;
}

int main() {
    printf("%d\n", match_content("input1.txt", "input2.txt"));
    return 0;
}