#include <stdio.h>
 
int main(void) {
    int i, j;
    // 外循环：控制行数（1~9行）
    for(i = 1; i <= 9; i++)
    {
        // 内循环：控制每行打印的式子数量（1~i个）
        for(j = 1; j <= i; j++)
        {
            // 打印乘法式，加空格分开，结果左对齐占2位
            printf("%d*%d=%-2d ", j, i, i * j);
        }
        // 一行打印完换行
        printf("\n");
    }
    return 0;
}
 

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