#include <stdio.h>

void caesar_encrypt(char* message, int key) {
    for (int i = 0; message[i] != '\0'; i++) {
        char c = message[i];

        if (c >= 'A' && c <= 'Z') {
            c = (c - 'A' + key) % 26 + 'A';
            message[i] = c;
        }
    }
}

int main() {
    char message[] = "BAREV ASHXARH";
    int key = 3;

    printf("Original: %s\n", message);
    caesar_encrypt(message, key);
    printf("Encrypted: %s\n", message);

    return 0;
}