类的示例数组 [英] Example array of class

问题描述

如何制作类数组？给我一些例子......

How make array of class? Give me some example...

推荐答案

你可以使用数组或指针在堆栈或堆上进行。 Std :: vector是很好的选择。

You can do on stack or heap using arrays or pointers. Std::vector is excellent option.

#include <iostream>
#include <vector>

using namespace std;

class MyClass
{
public:
	MyClass() {};
	MyClass(const int val) : myVal(val) {};
	int getVal() { return myVal;}; 
private:
	int myVal;
};

int main()
{
	const int arraySize = 10;

	// You can create on stack like so (which is not always a good idea)
	MyClass myArray[10];

	////////////////////////////////////////////////////////////////////
	// Better is to use heap and pointers.
	MyClass **classptr = new MyClass *[arraySize];

	for(int i = 0; i < arraySize; i++)
		classptr[i] = (MyClass *) new  MyClass(i);

	for(int i = 0; i < arraySize; i++)
		cout << classptr[i]->getVal() << endl;

	for(int i = 0; i < arraySize; i++)
		delete  classptr[i];

	delete classptr;

	//////////////////////////////////
	// Or you can use vector
	vector <MyClass *> myVector;

	for(int i = 0; i < arraySize; i++)
	{
		MyClass *myClass  = new  MyClass(i);
		myVector.push_back(myClass);
	}

	for(int i = 0; i < arraySize; i++)
		cout << myVector[i]->getVal() << endl;

	for(int i = 0; i < arraySize; i++)
		delete  myVector[i];

}

参考：示例 [ ^ ]

类的数组视频 [ ^ ]。

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