#include<stdio.h>
#include<math.h>
int main()
{
	double y;
	int x,m;
	for(y=1;y>=-1;y-=0.1)
	{
		m=acos(y)*10;
		for(x=1;x<m;x++)
			printf(" ");
		printf("*");
		for(;x<62-m;x++)
			printf(" ");
		printf("*\n");
	}
	getch();
}

运行结果: