vs无报错，运行完第一个for循环后自动结束退出

#include<iostream>
using namespace std;

const int N = 3, M = 3;

int main() {

    int re[N][M];

    cout << "请输入学生各门课的成绩: " << endl;
    for (int i = 0;i < N;i++) {
        for (int j = 0;j < M;j++) {
            cin >> re[i][j];
        }
        cout << endl;
    }

    for (int i = 0;i < N;i++) {
        for (int j = 0;j < M;j++) {
            cout << re[i][j] << " ";
        }
        cout << endl;
    }

    return 0;
}

cout<<endl去掉试试呢
return 前加 system("pause");