跪求大神帮忙运行下面程序会出现什么？？
#include<stdio.h>
void main()
{
    int a=1,k=5,b=1;
    while(a<=5)
    {
        c=1,b=1;
        while(b<2a)
        {
            while(c<k)
            {
                printf(" ");
                c++;
            }
            printf("*");
            b++;
        }
    }
        a++;
        k--;
        printf("\n");
    }