函数重载和运算符重载

1、函数重载：重载条件 =（ 参数类型不同 || 参数个数不同 || 参数顺序不同 ）

#include <iostream>
using namespace std;

int myAdd(int x, int y)
{
    return x+y;
}

double myAdd(double x, double y)
{
    return x + y;
}

int main(int argc, char* argv[])
{
    cout << "12 + 32 = " << myAdd(12, 32) << endl;
    cout << "11.1 + 22.2 = " << myAdd(11.1, 22.2) << endl;
    return 0;
}

xuanmiao@linux:~/Test/C++$ ./test29
12 + 32 = 44
11.1 + 22.2 = 33.3

 

2、运算符重载：operator +

#include <iostream>
using namespace std;

class CPerson
{
private:
    int money;

public:
    CPerson(int inMoney)
    {
        money = inMoney;
    }

    /* 对象和对象运算*/
    CPerson operator+ (const CPerson &b)
    {
        return CPerson(money + b.money);
    }

    /* 对象和基本类型数据运算 */
    CPerson operator+ (const int  intMoney)
    {
        return CPerson(money + intMoney);
    }

    void display(void)
    {
        cout << money << endl;
    }
};

int main( int argc, char *argv[] )
{
    CPerson person1(10);
    CPerson person2(20);
    CPerson person3 = person1 + person2;
    CPerson person4 = person3 + 100;
    person3.display();
    person4.display();
    return 0;
}

xuanmiao@linux:~/Test/C++$ ./test30
30
130