重载加号运算符示范

CMakeLists.txt

@@ -3,4 +3,4 @@ project(CPP_11_HeavyLoad)
 
 set(CMAKE_CXX_STANDARD 11)
 
-add_executable(CPP_11_HeavyLoad main.cpp test.cpp test.h)
+add_executable(CPP_11_HeavyLoad main.cpp test.cpp test.h operatorDemo.cpp operatorDemo.h)

main.cpp

 #include <iostream>
 #include "test.h"
+#include "operatorDemo.h"
 
 int main() {
 
@@ -11,6 +12,15 @@ int main() {
     test->max("字符串",12,12);
     cout<<max1<<","<<max2<<endl;
 
-    std::cout << "Hello, World!" << std::endl;
+    //重载＋号运算符
+    operatorDemo op1(12,12,12), op2(34,23,14); //申明两个类对象并给出初始值
+    op1.print();
+    op2.print();
+
+    //使用重载函数使两个对象相加
+    operatorDemo OP=op1+op2;  //实际上全写为： op1.operator+(op2); 只不过operator和()可以免写罢了
+    OP.print();
+
+
     return 0;
 }

operatorDemo.cpp

+//
+// Created by 11010 on 2023/4/8.
+//
+
+#include "operatorDemo.h"
+
+operatorDemo::operatorDemo(int w, int l, int h) : width(w), len(l), height(h) {
+
+}
+
+//重载加号,用于使两个对象相加
+operatorDemo operatorDemo::operator+(const operatorDemo &op) {
+    operatorDemo OP; //临时类变量，用于返回一个新的类对象
+    OP.width = width + op.width;
+    OP.len = len + op.len;
+    OP.height = height + op.height;
+
+    return OP;
+}
+
+
+operatorDemo::operatorDemo() {
+
+}
+
+void operatorDemo::print() {
+    cout<<"长："<<len<<",宽："<<width<<",高："<<height<<endl;
+}

operatorDemo.h

+//
+// Created by 11010 on 2023/4/8.
+//
+
+#ifndef CPP_11_HEAVYLOAD_OPERATORDEMO_H
+#define CPP_11_HEAVYLOAD_OPERATORDEMO_H
+#include <iostream>
+#include <string>
+
+using namespace std;
+
+//操作符重载类
+class operatorDemo {
+public:
+    int width;
+    int len;
+    int height;
+
+    operatorDemo(int w,int l,int h);
+    operatorDemo();
+    void print(); //打印信息
+
+    //申明重载函数： 重载+号，用于把两个对象的属性相加操作
+    operatorDemo operator+(const operatorDemo &op);
+};
+
+
+#endif //CPP_11_HEAVYLOAD_OPERATORDEMO_H