C++的算法题，达不到预期结果

Question

#include<iostream>
#include<cstring>
using namespace std;

typedef struct Student{
        string name;
        int Fin_Score;
        int Cla_Score;
        char Stu_Leader;
        char West;
        int thesis;
        int salary;
    }Stu;
    
int main()
{
    int N;
    int max = 0;
    int sum = 0;
    cin>>N;
    
    Stu a[N];
    
    for(int i=0;i<N;i++){
        getline(cin, a[i].name);
        cin>>a[i].Fin_Score>>a[i].Cla_Score>>a[i].Stu_Leader>>a[i].West>>a[i].thesis;
        a[i].salary = 0;
    }
    
    for(int i=0;i<N;i++){
        if(a[i].Fin_Score>80&&a[i].thesis>=1){
            a[i].salary += 8000;
        }
        if(a[i].Fin_Score>85&&a[i].Cla_Score>80){
            a[i].salary += 4000;
        }
        if(a[i].Fin_Score>90){
            a[i].salary += 2000;
        }
        if(a[i].Fin_Score>85&&a[i].West=='Y'){
            a[i].salary += 1000;
        }
        if(a[i].Cla_Score>80){
            a[i].salary += 850;
        }
        if(a[max].salary<a[i].salary){
            max = i;
        }
    }
    
    for(int i=0;i<N;i++){
        sum += a[i].salary;
    }
    
    cout<<a[max].name<<endl;
    cout<<a[max].salary<<endl;
    cout<<sum<<endl;
    return 0;
}这段代码为什么一直得不到预期的结果

Answer 1

#include <iostream>
#include <cstring>
using namespace std;

typedef struct Student {
    string name;
    int Fin_Score;
    int Cla_Score;
    char Stu_Leader;
    char West;
    int thesis;
    int salary;
} Stu;

int main() {
    int N;
    int max = 0;
    int sum = 0;
    cin >> N;
    cin.ignore(); // 清除输入流中的换行符

    Stu a[N];

    for (int i = 0; i < N; i++) {
        getline(cin, a[i].name);
        cin >> a[i].Fin_Score >> a[i].Cla_Score >> a[i].Stu_Leader >> a[i].West >> a[i].thesis;
        a[i].salary = 0;
        cin.ignore(); // 清除输入流中的换行符
    }

    for (int i = 0; i < N; i++) {
        if (a[i].Fin_Score > 80 && a[i].thesis >= 1) {
            a[i].salary += 8000;
        }
        if (a[i].Fin_Score > 85 && a[i].Cla_Score > 80) {
            a[i].salary += 4000;
        }
        if (a[i].Fin_Score > 90) {
            a[i].salary += 2000;
        }
        if (a[i].Fin_Score > 85 && a[i].West == 'Y') {
            a[i].salary += 1000;
        }
        if (a[i].Cla_Score > 80) {
            a[i].salary += 850;
        }
        if (a[i].salary > a[max].salary) { // 修正比较的逻辑
            max = i;
        }
    }

    for (int i = 0; i < N; i++) {
        sum += a[i].salary;
    }

    cout << a[max].name << endl;
    cout << a[max].salary << endl;
    cout << sum << endl;
    return 0;
}