赋值构造函数找错题

给出输出结果：

A，编译错误

B，编译成功，运行错误

C，编译正常，输出10

#include <iostream>
using namespace std;

class A
{
private:
	int value;
public:
	A(int a)
	{
		value =a;
	}
	A ( A other)
	{
		value =other.value;
	}
	void Print()
	{
		cout<<value<<endl;
	}

};

int main()
{
	A a = 10;
	A b = a;
	b.Print();
	system("pause");
	return 0;
}

结果：编译不过

正确的代码

#include <iostream>
using namespace std;

class A
{
private:
	int value;
public:
	A(int a)
	{
		value =a;
	}
	A ( const A &other)
	{
		value =other.value;
	}
	void Print()
	{
		cout<<value<<endl;
	}

};

int main()
{
	A a = 10;
	A b = a;
	b.Print();
	system("pause");
	return 0;
}