更多"下面程序的运行结果是 #include<iostream.h> c"的相关试题:
[单项选择]下面程序的运行结果是
#include<iostream.h>
class base
protected:
int a;
public:
base( )cout <<"0";
;
class basel:virtual base
public:
basel ( ) cout <<"1";
;
class base2:virtual base
public:
base2( )cout <<"2";
;
class derived:public basel,public base2
public:
derived( )cout <<"3";
;
void main( )
derived obj;
cout <<end1;
A. 0123
B. 3120
C. 0312
D. 3012
[单项选择]有如下程序:
#include <iostream.h>
class Base
protected: int i;
public: intj;
;
class Derived: public Base
int m;
public: int n;
;
int main( )
Derived d;
d.i=0; //[1]
d.j=0; //[2]
d.m=0; //[3]
d.n=0; //[4]
return 0;
其中主函数中有两个赋值语句有错,这两个错误的赋值语句是( )。
A. [1]和[2]
B. [1]和[3]
C. [2]和[3]
D. [2]和[4]
[单项选择]下面程序的运行结果是
#include<iostream.h>
class base{
protected:
int a;
public:
base( ) {cout < < "0";}
};
class base l: virtual base{
public:
base l ( ) {cout < <"1";}
};
class base 2: virtual base{
public:
base2 ( ) {cout < <"2";}
};
class derived: public base 1, public base2{
public:
derived( ) {cout < < "3";}
};
void main( )
{
derive obj;
cout < < endl;
}
A) 0123 B) 3120 C) 0312 D) 3012
[单项选择]下面程序的运行结果是 #include<iostream.h> class base{ protected: int a; public: base( ){cout <<"0";} }; class basel:virtual base{ public: basel ( ) {cout <<"1";} }; class base2:virtual base{ public: base2( ){cout <<"2";} }; class derived:public basel,public base2{ public: derived( ){cout <<"3";} }; void main( ) { derived obj; cout <<end1; }
A. 0123
B. 3120
C. 0312
D. 3012
[单项选择]下面程序的运行结果是( )。
#include<iostream.h>
class base{
protected:
int a;
public:
base( ){cout<<"0";}
};
class basel:virtual base{
public:
basel( ){cout<<"1";}
};
class base2:virtual base{
public:
base2( ){cout<<"2";}
};
class derived:public basel,public base2{
public:
derived( ){cout<<"3";}
};
void main( )
{
derived obj;
cout<<endl;
}
A. 123
B. 3120
C. 312
D. 3012