aaa.cpp

一个计算SIN X的函数,觉得算法还可以

#include <iostream>

using namespace std;

void main()

{
	int i,j;
	float x;
	double data=0.0;
	double da=1.0;

	cout<<"input x:";
	cin>>x;

	for ( i=0 ; i < 100; i ++ )
	{
		for ( j = 0; j < 2 * i - 1; j ++)
		{
			da = x * da;
			da = da / (j+1);
			da = - da;
		}
		data = data + da;
	}

	cout<<"sin "<<x<<"="<<data;
	system("pause");
}