C/C++绘制正弦曲线

#include <iostream>
#include <cmath>
using namespace std;

int main()
{
 double y;       //纵坐标
 int i, x, tmpX;

 for (y = 1; y >= -1; y -= 0.1)
 {
  tmpX = abs(asin(y)) * 10;//放大10倍
  if (y >= 0)
  {//前半周期
   for (x = 0; x < tmpX; x++)
    cout << " ";
   cout << "*";

   for (; x < 31-tmpX; x++)
    cout << " ";
   cout << "*" << endl;
  }
  else
  {
   for (x = 0; x <= 31+tmpX; x++)//后半周期
    cout << " ";
   cout << "*";

   for (; x <= 62-tmpX; x++)
    cout << " ";
   cout << "*" << endl;
  }
 }
 system("pause");
 return 0;
}