(2021.11.15) C언어 예제 - 메세지 암호화

#include <stdio.h>

void encrypt(char cipher[], int shift);

int main (void){
	char cipher[50];
    int shift=3;
    
    printf("문자열 입력: ");
    gets_s(cipher, 50);
    encrypt (cipher, shift);
    return 0;
}
void encrypt (char cipher[], int shift){
	int i = 0;
    
    while (cipher[i] != '\0'){
    	if (cipher[i] >= 'A' && cipher[i] <= 'z'){
        	cipher[i] += shift;
            if (cipher[i] > 'z')
            	cipher[i] -= 26;
        }
        i++;
    }
    printf("암호화된 문자열: %s \n", cipher);
}