Question

看看这些C++程序运行的结果是什么？在线等。急！！！谢谢啦

1. 写出下列程序的运行结果
#include <iostream.h>
int i=15;
void main()
{
int i;
i=100;
::i=i+1;
cout<<::i<<endl;
}

2. 写出下列程序的运行结果
class Person{
public:
Person(){cout<< “Constructor of Person”<<endl;}
~Person(){cout<< “Destructor of Person”<<endl;}
};
class Student:public Person{
public:
Student(){cout<< “Constructor of Student”<<endl;}
~Student(){cout<< “Destructor of Student”<<endl;}
};
class Teacher:public Person{
public:
Teacher(){cout<< “Constructor of Teacher”<<endl;}
~Teacher(){cout<< “Destructor of Teacher”<<endl;}
};
void main()
{
Student s;
Teacher t;
}

3. 写出下列程序的运行结果。
#include <iostream.h>
int square(int i) {return i*i;}
float square(float i) {return i*i;}
double square(double i) {return i*i;}
int main()
{ int i=12;
float f=3.0;
double d=5.0;
cout<<i<<'*'<<i<<'='<<square(i)<<'\n';
cout<<f<<'*'<<f<<'='<<square(f)<<'\n';
cout<<d<<'*'<<d<<'='<<square(d)<<'\n';
return 0;
}

4. 写出下面程序运行的结果。
#include <iostream.h>
class B{
public:
B(){cout<< “class B”<<endl;}
};
class X:virtual public B
{
public:
X(){cout<< “class X”<<endl;}
};
class Y:virtual public B
{
public:
Y(){cout<< “class Y”<<endl;}
};
class D:public X,public Y
{
public:
D(){cout<< “class D”<<endl;}
};
void main()
{ D obj; }

5. 写出下面程序运行的结果。
#include <iostream.h>
int main()
{
int *p;
p=new int(99);
cout<<*p++;
delete --p;
return 0;
}
我也想啊，不知道为什么我的VC++出毛病了。。。麻烦大哥们帮我把另外一个提问也搞定了吧，谢谢啦。还有6-10的。

Answer 1

实在没有什么技术含量！

1)
101

2)
Constructor of Person
Constructor of Student
Constructor of Person
Constructor of Teacher
Destructor of Teacher
Destructor of Person
Destructor of Student
Destructor of Person

3)
12*12=144
3*3=9
5*5=25

4)
class B
class X
class Y
class D

5)
99

Answer 2

老大，你拿编译器，搞一下不就知道了。我很久不用C++编译器了。

Answer 3

1) 101
2)
Constructor of Person
Constructor of Student
Constructor of Person
Constructor of Teacher
Destructor of Teacher
Destructor of Person
Destructor of Student
Destructor of Person
3)
12*12=144
3*3=9
5*5=25
4)
class B
class X
class Y
class D
5)
99