题解 | #密码验证合格程序#

#include <stdio.h>
#include <string.h>
int main() {
    char str[100];
    while ((scanf("%s", str) != EOF)) {
        int len = strlen(str);
        int change[4] = {0};
        int num = 0;
        int flag = 0;
        int yy = 0;
        //判断密码长度是否符合
        if (len < 8) {
            printf("NG\n");
            continue;
        }
        //判断密码元素是否齐全；
        for (int i = 0 ; i < len ; i ++) {

            if ( str[i] >= '0' && str[i] <= '9') {
                change[0] = 1;
                continue;
            } else if (str[i] >= 'a' && str[i] <= 'z') {
                change[1] = 1;
                continue;
            } else if (str[i] >= 'A' && str[i] <= 'Z') {
                change[2] = 1;
                continue;
            } else {
                change[3] = 1;
                continue;
            }
        }
        for (int i = 0 ; i < 4 ; i++) {
            if (change[i] == 1) {
                num++;
            }
        }
        if (num < 3) {
            printf("NG\n");
            continue;
        };

        //判断密码是否有长度大于二的包含公共元素的字串重复
        for (int i = 0 ; i < len - 6 ; i++) {
            for (int j = i + 3 ; j < len - 3 ; j++) {
                if (str[i] == str[j] && str[i + 1] == str[j + 1] && str[i + 2] == str[j + 2]) {
                    yy = 1;
                    break;
                }
            }
            if (yy) {
                break;
            }
        }

        if (yy) {
            printf("NG\n");
            continue;
        }

        printf("OK\n");
        continue;
    }
    return 0;
}