C++概述

#include <iostream>
using namespace std;
/*函数功能：计算两个整数相加之和 */
int Add(int a, int b)
{
    return (a + b);
}
//主函数
int main()
{
    int  x, y, sum = 0;
    cout<<"Input two integers:";
    cin>>x>>y;
    sum = Add(x, y);
    cout<<"sum = "<<sum<<endl;
    return 0;
}

#include <iostream>
using namespace std;
/*函数功能：计算三个整数相加之和 */
int Add(int a, int b, int c)
{
    return (a + b + c);
}
//主函数
int main()
{
    int  x, y, z, sum = 0;
    cout<<"Input three integers:";
    cin>>x>>y>>z;
    sum = Add(x, y, z);
    cout<<"sum = "<<sum<<endl;
    return 0;
}