[C++知识库]C++ []符号重载

.h文件

#include<iostream>

using namespace std;

class ArrayClass {

private:
    int def = 10;
    int size = 0;
    int *value = (int *) malloc(sizeof(int) * def);

public:
    void set(int, int);

    int getSize()const;

    int operator[](int) const;


};

.cpp文件

#include "ArrayClass.h"

int ArrayClass::getSize() const {
    return this->size;
}

void ArrayClass::set(int index, int value) {
    *(this->value + index) = value;
    this->size++;
}

int ArrayClass::operator[](int index) const {
    return *(this->value + index);
}

main文件

#include <iostream>
#include "ArrayClass.h"

void printfArrayList(const ArrayClass &arrayClass){
    for (int i = 0; i < arrayClass.getSize(); ++i) {
        cout << arrayClass[i]<<endl;

    }
}

int main() {
    ArrayClass arrayClass;
    arrayClass.set(0, 0);
    arrayClass.set(1, 1);
    arrayClass.set(2, 2);
    arrayClass.set(3, 3);
    arrayClass.set(4, 4);
    arrayClass.set(5, 5);
    arrayClass.set(6, 6);
    arrayClass.set(7, 7);
    printfArrayList(arrayClass);
}