memory_analysis.cpp

#include <iostream>
#include "include/Complexe.h"

using namespace std;

// 用指针的版本（仅用于对比）
class ComplexeWithPointers {
private:
    double* R;
    double* I;
public:
    ComplexeWithPointers(double r = 0, double i = 0) {
        R = new double(r);
        I = new double(i);
    }
    
    ~ComplexeWithPointers() {
        delete R;
        delete I;
    }
    
    // 需要拷贝构造函数和赋值运算符...
    ComplexeWithPointers(const ComplexeWithPointers& other) {
        R = new double(*other.R);
        I = new double(*other.I);
    }
    
    ComplexeWithPointers& operator=(const ComplexeWithPointers& other) {
        if (this != &other) {
            delete R;
            delete I;
            R = new double(*other.R);
            I = new double(*other.I);
        }
        return *this;
    }
};

int main() {
    cout << "=== 内存占用分析 ===" << endl;
    cout << "sizeof(double): " << sizeof(double) << " bytes" << endl;
    cout << "sizeof(double*): " << sizeof(double*) << " bytes" << endl;
    cout << "sizeof(Complexe): " << sizeof(Complexe) << " bytes" << endl;
    cout << "sizeof(ComplexeWithPointers): " << sizeof(ComplexeWithPointers) << " bytes" << endl;
    
    cout << "\n=== 实际内存使用分析 ===" << endl;
    cout << "当前实现 (两个double成员):" << endl;
    cout << "  - 对象本身: " << sizeof(Complexe) << " bytes" << endl;
    cout << "  - 堆内存: 0 bytes" << endl;
    cout << "  - 总计: " << sizeof(Complexe) << " bytes" << endl;
    
    cout << "\n指针版本:" << endl;
    cout << "  - 对象本身: " << sizeof(ComplexeWithPointers) << " bytes (两个指针)" << endl;
    cout << "  - 堆内存: " << 2 * sizeof(double) << " bytes (两个double)" << endl;
    cout << "  - 内存管理开销: ~16-32 bytes (malloc头部信息等)" << endl;
    cout << "  - 总计: 约 " << sizeof(ComplexeWithPointers) + 2 * sizeof(double) + 24 << " bytes" << endl;
    
    return 0;
}