题解 | #简单密码#

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

int main() {
    char input[100];
    scanf("%s", input);
    int len = strlen(input);
    for (int i = 0; i < len; i++) {
        char t = input[i];
        if(islower(t)){
            if(t >= 'a' && t <= 'c') input[i] = '2';
            else if(t >= 'd' && t <= 'f') input[i] = '3';
            else if(t >= 'g' && t <= 'i') input[i] = '4';
            else if(t >= 'j' && t <= 'l') input[i] = '5';
            else if(t >= 'm' && t <= 'o') input[i] = '6';
            else if(t >= 'p' && t <= 's') input[i] = '7';
            else if(t >= 't' && t <= 'v') input[i] = '8';
            else input[i] = '9';
        }
        else if(isupper(t)){
            if(t == 'Z') input[i] = 'a';
            else input[i] += 33;
        }
    }
    printf("%s\n", input);
}