小编Pat*_*hin的帖子

我有一个简单的程序来测试我的两个3D矢量的交叉产品是否有效.

#include <iostream>
#include "math\Vec3.h"

using namespace std;

int main(int argc, char **argv)
{
    Vec3 v1(1, 23, 5);
    Vec3 v2(7, 3, 4);
    cout << "Crossing v1 and v2" << endl;
    Vec3 v3 = v1.cross(v2);
    cout << "crossed" << endl;
    return 0;
}

为什么在创建变量之后调用析构函数？
这是打印出来的:

Created: Vec3[1, 23, 5]
Destroy: Vec3[1, 23, 5]     // Why is the vector destroyed here?
Created: Vec3[7, 3, 4]
Destroy: Vec3[7, 3, 4]      // And here?
Crossing v1 and v2
Created: Vec3[77, 31, -158]
Destroy: Vec3[77, …