c++结构体与字符数组的比较问题

#include <iostream>
#include <cstring>
#include <string>

struct Goal {
    char program[20];
    char sex[21];
    std::string school;
    int grade;
    int goal;
};

int main() {
    int i, j, n, x;
    struct Goal a[20];
    char sc[20];
    int g[5] = {0}, m[5] = {0}, w[5] = {0};

    std::cout << "请输入n的值：" << std::endl;
    std::cin >> n;

    for (i = 0; i < n; i++) {
        std::cout << "请输入学生的program、sex、school、grade和goal：" << std::endl;
        std::cin >> a[i].program >> a[i].sex >> a[i].school >> a[i].grade >> a[i].goal;
    }

    for (i = 0; i < n; i++) {
        x = std::stoi(a[i].school);

        for (j = 0; j < n && std::stoi(a[j].school) == x; j++) {
            g[i] = g[i] + a[j].goal;
            w[i]++;
        }

        for (j = 0; j < n && std::stoi(a[j].school) == x && strcmp(a[j].sex, "man") == 0; j++) {
            m[i] = m[i] + a[j].goal;
        }

        for (j = 0; j < n && std::stoi(a[j].school) == x && strcmp(a[j].sex, "woman") == 0; j++) {
            w[i] = w[i] + a[j].goal;
        }
    }

    std::cout << "各个学校总分和男生总分是：" << std::endl;
    for (i = 0; i < n; i++) {
        std::cout << a[i].school << ": " << g[i] << " " << m[i] << std::endl;
    }

    return 0;
}