/*** test.cpp*/#include<iostream>usingnamespacestd;voidadd(intx,inty){cout<<"int: "<<x+y<<endl;}voidadd(doublex,doubley){cout<<"double: "<<x+y<<endl;}voidadd(doublex,doubley,doublez){cout<<"double: "<<x+y+z<<endl;}intmain(intargc,char**argv){add(1,1);add(1.0,1.0)...
运算符'<<'和'>>'被称为'cout << ob1'和'cin >> ob1'。因此,如果我们想让它们成为成员方法,那么它们必须成为ostream和istream类的成员,这在大多数时候都不是一个好的选择。因此,这些运算符作为全局函数被重载,具有两个参数cout和用户定义类的对象。 以下是完整的C ++程序,用于演示<>运算符的重载。 #in...
cout <<"1"<< endl; }voidshow(longa,intb){ cout <<"2"<< endl; }voidtest(){longx =1;inta =2;show(a, x);show(x, a); }// 函数重载的本质- 本质上是2个独立的函数,主要靠函数名和形参列表区分开来 -// 函数重载的内部实现1.用vcifld分别实现:void,char,int,float,long,double形参类型...
#include <iostream> using namespace std; //void func(int a = 10, int b = 60, int c = 20); // //void func(int a, int b, int c) { // cout << "a is " << a << endl; // cout << "b is " << b << endl; // cout << "c is " << c << endl; //} int ...
cout<<add(2.9,15.3)<<endl; cout<<add(10,9.9)<<endl; cout<<add(11.5,5)<<endl; return0; } 运行结果如下: 请大家仔细阅读代码,为了确认哪个函数得到执行,我们在函数内部加了一句cout的输出语句,用来区分哪个函数得到调用。 大家一定自行上机实验理解代码!
函数重载可以视为C ++中多态功能的一个示例。 以下是一个简单的C ++示例,以演示函数重载: #includeusingnamespacestd;voidprint(inti){cout<<" Here is int "<<i<<endl;}voidprint(doublef){cout<<" Here is float "<<f<<endl;}voidprint(charconst*c){cout<<" Here is char* "<<c<<endl;}int...
max(double a,double b) { return a>=b?a:b; } int main() { cout<<"max int is: ...
#includeusingnamespacestd;classComplex{private:intreal,imag;public:Complex(intr=0,inti=0){real=r;imag=i;}voidprint(){cout<<real<<" + i"<<imag<<endl;}// The global operator function is made friend of this class so// that it can access private membersfriendComplexoperator+(Complexconst&...
// 重载加法运算符Complexoperator+(constComplex& other)const{returnComplex(real_ + other.real_, imag_ + other.imag_);} voidprint()const{std::cout<< real_ <<" + "<< imag_ <<"i"<<std::endl;} private:doublereal_;doubleimag_;}; ...