#include<stdio.h>
int main(void)
{
    for (short i = 1; i <= 9; i++)
    {
        for (short j = 1; j <= i; j++)
        {
            printf("%d*%d=%2d ", j, i, j * i);
        }
        printf("\n");
    }
    return 0;
}

参考答案：

#include <iostream>
using namespace std;
int main()
{
    for (int i = 1; i <= 9; i++)
    {
        for (int j = 1; j <= i; j++)
        {
            printf("%d*%d=%2d ", j, i, j * i);
        }
        printf("\n");
    }
    return 0;
}