用模板比较不同类型值，求出最大的那个

//main.cpp
#include <iostream>
#include "maximum.h"

using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char** argv) {
    //int类型 
    int int1,int2,int3;
    cout<<"input 3 integer:"<<endl;
    cin>>int1>>int2>>int3;   
    cout<<"maximum integer value is "<<maximum(int1,int2,int3)<<endl;

    //double类型 
    double double1,double2,double3;
    cout<<"input 3 double type number:"<<endl;
    cin>>double1>>double2>>double3;  
    cout<<"maximum double type value is "<<maximum(double1,double2,double3);

    return 0;
}

//maximum.h
//求最大值的方法
template<class T>
T maximum(T value1,T value2,T value3)
{
    T maximumValue=value1>value2?value1:value2;
    maximumValue=maxim
    umValue>value3?maximumValue:value3;

    return maximumValue;
}

效果如下