打印九九乘法表

#include<stdio.h>int main(){    int i, j;    i = 1;    while(i <= 9)    {        j = 1;        while(j <= i)        {            printf("%d*%d=%d", j, i, i*j);            if(i*j < 10)            {                printf("   ");            }            else            {                printf("  ");            }            j++;        }        i++;        printf("\n");    }    return 0;}