2维表格

#include<iostream>
#include<cmath>
#include<iomanip>
using namespace std;
int a[3][4]={{91,99,80 },
             {92,98,100},
             {98,85,99 }
};
int y = sizeof(a) / sizeof(a[0]);
int x = sizeof(a[0]) / sizeof(a[0][0])-1;

int main() {

    for (int i = 0; i < y; i++) {
        int c = 0;
        for (int j = 0; j < x; j++) {
            c = c + a[i][j];
            cout << a[i][j]<<'\t';
            a[i][x] = c;
        }
        cout << a[i][x];
        cout << endl;
    }

    system("pause");//卡屏函数
    return 0;
}