C++打印乘法表

#include <iostream>
#include <Windows.h>
#include <iomanip>

using namespace std;

int main(void) {
    int width;

    for (int i = 1; i <= 9; i++) {
        for (int j = 1; j <= i; j++) {
            width = (j == 1) ? 1 : 2;
            cout << j << "x" << i << "=" << setw(width) << left << i * j << " ";
        }
        cout << endl;
    }
    system("pause");
    return 0;
}