由于好奇STL中的vector 对于自定义数据类型的 “ = ”(赋值运算符的)支持,谢了一段简单的测试代码进行测试。
结果证明vector对于赋值预算符支持良好,但是对于动态分配的类构成的vector数组,
博主认为一定要重写析构函数与复制构造函数以及运算符重载“=”运算符(这是一条软件规则,详见博主测试),链接如下:
http://blog.csdn.net/u010003835/article/details/47314811
测试代码:
#include <iostream>
#include <vector>
using namespace std;
#pragma warning(disable:4996)
struct Point{
int x;
int y;
};
void Print(vector<Point> &PointList){
for (int i = 0; i < PointList.size(); i++){
cout << PointList[i].x <<" "<< PointList[i].y << endl;
}
cout << endl << endl;
}
int main(){
vector<Point> PointList1;
vector<Point> PointList2;
Point a;
a.x = 1;
a.y = 2;
PointList1.push_back(a);
a.x = 3;
a.y = 2;
PointList1.push_back(a);
a.x = 4;
a.y = 2;
PointList1.push_back(a);
Print(PointList1);
cout << "test of = operator (whole vector copy)" << endl;
PointList2 = PointList1;
Print(PointList2);
cout << "test of = operator (part of the vector)" << endl;
PointList2[1] = PointList1[2];
PointList2[0] = PointList1[2];
Print(PointList2);
return 0;
}
版权声明:本文为博主原创文章,未经博主允许不得转载。
原文地址:http://blog.csdn.net/u010003835/article/details/47663143