c语言的九九乘法表 while

#include <stdio.h>
int main()
{
    int a,b;
        a = 1;
        b = 1;
    while (a<=9)
    {
        b=1;
        while(b<=a)
        {
            printf("%d*%d=%d\t",b,a,a*b);
            b++;
        }
            printf("\n");
            a++;
        }
}