程序代码：

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
    double y;
    int x, val;
    for (y = 1; y >= -1; y -= 0.1)
    {
        val = acos(y) * 10;
        for (x = 1; x < val; x++)
            cout << " ";
        cout << "*";
        for (; x < 62 - val; x++)
            cout << " ";
        cout << "*";
    }
    return 0;
}