第10章运算符重载 10.1什么是运算符重载 10.2运算符重载的方法 10.3重载运算符的规则 10.4运算符重载函数作为类成员函数和友元函 数 10.5 重载双目运算符 10.6重载单目运算符 10.7重载流插入运算符和流提取运算符 10.8不同类型数据间的转换 2017年4月26日12时 HO 第10章运算符重载 5分 BACK NEX
HOME 10.1 什么是运算符重载 10.2 运算符重载的方法 10.3 重载运算符的规则 10.4 运算符重载函数作为类成员函数和友元函 数 10.5 重载双目运算符 10.6 重载单目运算符 10.7 重载流插入运算符和流提取运算符 10.8 不同类型数据间的转换 2017年4月26日12时 15分 第10章 运算符重载 2
10.1什么是运算符重载 Operator Overloading Operator overloading allows the programmer to define versions of the predefined operators for operands of class type. Operator overloading is just "syntactic sugar,"which means it is simply another way for you to make a function call. The difference is that the arguments for this function don't appear inside parentheses,but instead they surround or are next to characters you've always thought of as immutable operators. 2017年4月26日12时 第10章运算符重载 3 BACK NEX
HOME • Operator overloading allows the programmer to define versions of the predefined operators for operands of class type. • Operator overloading is just “syntactic sugar, ” which means it is simply another way for you to make a function call. • The difference is that the arguments for this function don’t appear inside parentheses, but instead they surround or are next to characters you’ve always thought of as immutable operators. 2017年4月26日12时 15分 第10章 运算符重载 3
Syntax Defining an overloaded operator is like defining a function,but the name of that function is operator@,in which represents the operator that's being overloaded. Return type Name (parameters list ) Return type operator@(parameters list ) 2017年4月26日12时 H0平5务 第10章运算符重载 4 BACK NEXT
HOME • Defining an overloaded operator is like defining a function, but the name of that function is operator@, in which @ represents the operator that’s being overloaded. • Return type Name (parameters list ); • Return type operator@ (parameters list ); 2017年4月26日12时 15分 第10章 运算符重载 4
Syntax The number of arguments depends on two factors: 1.Whether it's a unary operator (one argument)or a binary operator (two arguments). 2.Whether the operator is defined as a global function (one argument for unary,two for binary)or a member function (zero arguments for unary,one for binary-the object becomes the left-hand argument). 2017年4月26日12时 H05务 第10章运算符重载 5 BACK NEXT
HOME • The number of arguments depends on two factors: • 1. Whether it’s a unary operator (one argument) or a binary operator (two arguments). • 2. Whether the operator is defined as a global function (one argument for unary, two for binary) or a member function (zero arguments for unary, one for binary – the object becomes the left-hand argument). 2017年4月26日12时 15分 第10章 运算符重载 5
例10.1通过函数来实现复数相加 #include <iostream> using namespace std; class Complex public: Complex(){real=0;imag-0;) Complex(double r,double i)freal=r;imag=i;} Complex complex_add(Complex &c2); void display(); /声明输出函数 private: double real; /实部 double imag; ∥虚部 2017年4月26日12时 H0务 第10章运算符重载 6 BACK NEXT
HOME #include <iostream> using namespace std; class Complex { public: Complex( ) {real=0;imag=0;} Complex(double r,double i) {real=r;imag=i;} Complex complex_add(Complex &c2); void display( ); //声明输出函数 private: double real; //实部 double imag; //虚部 }; 2017年4月26日12时 15分 第10章 运算符重载 6