题解 | #简单密码#

#include<ctype.h>

void dealUpper(char *ch);

void dealUpper(char *ch) {
    if(*ch == 'Z') {
        *ch = 'a';
    }
    else {
        *ch = *ch + 'a'-'A' + 1;
    }
    
}

int main(void) {
    char s[100] = "";
    int i = 0;
    int count = 2;
    int k = 0;
    char ar[128] = {0};

    for(i = 'a'; i <= 'z'; i++) {
        ar[i] = count + '0';
        k++;
        if(i == 'r' || i == 'y') {
            k--;
        }
        else if(k == 3) {
            count++;
            k = 0;
        }

    }
    gets(s);
    for(i = 0; i < strlen(s); i++) {
        if(isupper(s[i])) {
            dealUpper(s+i);
        }
        else if(islower(s[i])) {
            s[i] = ar[s[i]];
        }
    }
    puts(s);
    return 0;
}