编程学习网为您整理以下代码实例，主要实现：C++使用另一个对象复制构造函数，希望可以帮到各位朋友。
@H_419_1@#include <iostream>
using namespace std;
class line {
public:
int getLength( voID );
line( int len ); // simple constructor
line( const line &obj); // copy constructor
~line(); // destructor
private:
int *ptr;
};
// Member functions deFinitions including constructor
line::line(int len) {
cout << "normal constructor allocating ptr" << endl;
// allocate memory for the pointer;
ptr = new int;
*ptr = len;
}
line::line(const line &obj) {
cout << "copy constructor allocating ptr." << endl;
ptr = new int;
*ptr = *obj.ptr; // copy the value
}
line::~line(voID) {
cout << "Freeing memory!" << endl;
delete ptr;
}
int line::getLength( voID ) {
return *ptr;
}
voID display(line obj) {
cout << "Length of line : " << obj.getLength() <<endl;
}
// Main function for the program
int main() {
line line1(10);
line line2 = line1; // This also calls copy constructor
display(line1);
display(line2);
return 0;
}
本站部分内容来源互联网,如果有图片或者内容侵犯您的权益请联系我们删除！