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

void to_encrypt() {

    char line[150], encrypted_line[150];
    int offset;

    printf("Enter encryption offset: ");
    scanf("%d", &offset);

    FILE *file = fopen("Test.txt", "r");
    FILE *encrypted_file = fopen("Test_Encrypted.txt", "w");

    if (file == NULL)
        printf("Failed to open file.");

    fgets(line, 150, file); /* testing to see if fgets() is reading the file*/
    printf("%s", line);

    while (fgets(line, 150, file)) {

        for (int c = 0; c <= (sizeof(line) / sizeof(line[0])); c++) {
            if (line[c] + offset >= 127) {
                encrypted_line[c] = 32 + ((line[c] + offset) - 127);
            } else {
                encrypted_line[c] = line[c] + offset;
            }

        }

        printf("%s", encrypted_line);
        fprintf(encrypted_file, "%s\n", encrypted_line);

    }


    fclose(file);
    fclose(encrypted_file);

}


void to_decrypt(void) {



}


int main() {

    to_encrypt();

    return 0;

}