learn-cpp/template/template-overloading.cpp at master · zing-dev/learn-cpp

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// Created by zing on 6/10/2020.

#include<iostream>

#include <string>

using namespace std;

class Person {

public:

Person(string name, int age) {

this->m_Name = name;

this->m_Age = age;

}

string m_Name;

int m_Age;

};

//普通函数模板

template<class T>

bool myCompare(T &a, T &b) {

if (a == b) {

return true;

} else {

return false;

}

//具体化，显示具体化的原型和定意思以template<>开头，并通过名称来指出类型

//具体化优先于常规模板

template<>

bool myCompare(Person &p1, Person &p2) {

if (p1.m_Name == p2.m_Name && p1.m_Age == p2.m_Age) {

return true;

} else {

return false;

}

void test01() {

int a = 10;

int b = 20;

//内置数据类型可以直接使用通用的函数模板

bool ret = myCompare(a, b);

if (ret) {

cout << "a == b " << endl;

} else {

cout << "a != b " << endl;

}

void test02() {

Person p1("Tom", 10);

Person p2("Tom", 10);

//自定义数据类型，不会调用普通的函数模板

//可以创建具体化的Person数据类型的模板，用于特殊处理这个类型

bool ret = myCompare(p1, p2);

if (ret) {

cout << "p1 == p2 " << endl;

} else {

cout << "p1 != p2 " << endl;

}

int main() {

test01();

test02();

return 0;

}

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