题解 | 密码强度等级

#include <iostream>
#include <string>
#include <vector>
using namespace std;

int main() {
    string str;
    getline(cin,str);
    int len = str.length();
    int num=0;
    vector<char>a1,a2,b,c;
    int a11,a21,b1,c1;
    if(0 <= len && len<=  4){
        num += 5; 
    }else if(5 <= len && len <= 7){
        num += 10;
    }else{
        num += 25;
    }
    for(int i=0 ; i<len ; i++){
        char ch = str[i];
        if(ch >= '1' && ch <='9'){//数字向量：b
            b.push_back(ch);
        }
        if(ch >= 'A' && ch <='Z'){//大写字母向量：a1
            a1.push_back(ch);
        }
        if(ch >= 'a' && ch <='z'){//小写字母向量：a2
            a2.push_back(ch);
        }
        if(((int)ch >= 33 && (int)ch <= 47) || ((int)ch >= 58 && (int)ch <= 64) || ((int)ch >= 91 && (int)ch <= 96) || ((int)ch >= 123 && (int)ch <= 126)){//符号向量：c
            c.push_back(ch);
        }
    }
    a11 = a1.size();//大写字母数量
    a21 = a2.size();//小写字母数量
    b1 = b.size();//数字数量
    c1 = c.size();//符号数量
    if((a11 == 0 && a21 != 0) || (a11 != 0 && a21 == 0)){
        num += 10;
    }else if(a11 != 0 && a21 != 0){
        num += 20;
    }
    if(b1 == 1){
        num += 10;
    }else if(b1 > 1){
        num += 20;
    }
    if(c1 == 1){
        num += 10;
    }else if(c1 > 1){
        num += 25;
    }
    if(a11 != 0 && a21 != 0 && b1 != 0 && c1 != 0){
        num += 5;
    }else if((a11 != 0 || a21 != 0) && b1 != 0 && c1 != 0){
        num += 3;
    }else if((a11 != 0 || a21 != 0) && b1 != 0 && c1 == 0){
        num += 2;
    }

    if(num >= 90){
        cout << "VERY_SECURE";
        return 0;
    }
    if(num >= 80 && num < 90){
        cout << "SECURE";
        return 0;
    }
    if(num >= 70 && num < 80){
        cout << "VERY_STRONG";
        return 0;
    }
    if(num >= 60 && num < 70){
        cout << "STRONG";
        return 0;
    }
    if(num >= 50 && num < 60){
        cout << "AVERAGE";
        return 0;
    }
    if(num >= 25 && num < 50){
        cout << "WEAK";
        return 0;
    }
    if(num >= 0 && num < 25){
        cout << "VERY_WEAK";
        return 0;
    }
}