C语言：打印9*9乘法表

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