#include<iostream>
using namespace std;
int main()
{
// 爱心曲线方程 (x^2+y^2-a)^3 - x^2 y^3 = 0
int a = 1;
// 定义绘图边界
double bound = 1.3 * sqrt(a);
// x、y坐标变化步长
double step = 0.05;
for (double y = bound; y >= -bound; y -= step)
{
for (double x = -bound; x <= bound; x += step)
{
double result = pow((pow(x, 2) + pow(y, 2) - a), 3) - pow(x, 2) * pow(y, 3);
if (result <= 0)
cout << "*";
else
cout << " ";
}
cout << endl;
}
cin.get();
}