C ++ operator overloading relationship
C ++ function overloading and operator overloading
C ++ language supports a variety of relational operators (<,>, <=,> =, ==, etc.), they can be used to compare the C ++ built-in data types.
You can override any of the relational operators, the overloaded relational operators can be used to compare objects of the class.
The following example demonstrates how overloaded <operator. Similarly, you can also try other overloaded relational operators.
#include <iostream> using namespace std; class Distance { private: int feet; // 0 到无穷 int inches; // 0 到 12 public: // 所需的构造函数 Distance(){ feet = 0; inches = 0; } Distance(int f, int i){ feet = f; inches = i; } // 显示距离的方法 void displayDistance() { cout << "F: " << feet << " I:" << inches <<endl; } // 重载负运算符( - ) Distance operator- () { feet = -feet; inches = -inches; return Distance(feet, inches); } // 重载小于运算符( < ) bool operator <(const Distance& d) { if(feet < d.feet) { return true; } if(feet == d.feet && inches < d.inches) { return true; } return false; } }; int main() { Distance D1(11, 10), D2(5, 11); if( D1 < D2 ) { cout << "D1 is less than D2 " << endl; } else { cout << "D2 is less than D1 " << endl; } return 0; }
When the above code is compiled and executed, it produces the following results:
D2 is less than D1