OperatorSpeed

gistfile1.cpp

#include <iostream>
#include <time.h>

using namespace std;
const double pi = 3.14159265F;
const double s2 = 1.41421356F;
const int n = 1000000000; 

int main()
{
	int a = clock();
	double r;
	for(int i=0;i<n;++i)
	{
		double r = pi + s2;
	}
	int b = clock();
	for(int i=0;i<n;++i)
	{
		double r = pi - s2;
	}
	int c = clock();
	for(int i=0;i<n;++i)
	{
		double r = pi * s2;
	}
	int d = clock();
	for(int i=0;i<n;++i)
	{
		double r = pi / s2;
	}
	int e = clock();
	cout << "add " << b-a << endl;
	cout << "sub " << c-b << endl;
	cout << "mul " << d-c << endl;
	cout << "div " << e-d << endl;
	getchar();
}