c++实现比较两辆卡车的哩/加仑，哪辆卡车更划算。

1公升等于0.264179加仑
输入：消耗的汽油公升数和行驶的英里数
输出：哩/加仑
其具体实现代码如下：

#include<iostream>
using  namespace std;

const double m = 0.264179;

double carValue1(double gs,double yl) 
{
    double ave;
    ave = yl / (gs * m);
    return ave;
} 
double carValue2(double gs,double yl) 
{
    double ave;
    ave = yl / (gs * m);
    return ave;
}
int main()
{
	double i,j,k,t;
	double car1,car2;
	cout<<"请输入卡车1的公升数和英里数：";
	cin>>i>>j;
	cout<<"请输入卡车2的公升数和英里数：";
	cin>>k>>t;
	car1 = carValue1(i,j);
	car2 = carValue2(k,t);
	if(car1<car2)
	    cout<<"卡车1更划算"<<endl;
	else if(car1>car2)
		cout<<"卡车2更划算"<<endl; 
	else
		cout<<"卡车1和卡车2同样划算"<<endl;
	
	return 0;
 }