更多"下面程序的执行结果为 #include'iostream' "的相关试题:
[单项选择]下面程序的执行结果为
#include"iostream"
using namespace std;
class A
int a;
public:
void Seta(int x)a=x;
void Display_a( )cout<<a<<endl;
;
class B
int b;
public:
void Setb(int x)b=x;
void Dispaly-b( ) cout<<b<<endl;
;
class C://public A,private B
private:
int c;
public:
void Setc(int x,int y,int z)
c=z;Seta(x);Setb(y);
void Display_c( ) cout<<c<<endl;
;
①void main( )
②
③ C cc;
④ cc.Seta(1);
⑤ cc.Display_a( );
⑥ cc.Setc(2,2,3);
⑦ cc.Dispaly-b( );
⑧ cc.Display_c( );
A. 输出为2 2 3
B. 有错误在第5行
C. 输出为1 2 3
D. 有错误在第7行
[单项选择]以下程序执行后的输出结果是 #include <iostream> using namespace std; void try(int,int,int,int); int main ( ) { int x,y,z,r; x =1 ; y = 2; try(x,y,z,r); cout<<r<<endl; return 0; } void try(int x,int y,int z,int r) { z = x+y; x = x*x; y = y*y; r = z+x+y; }
A. 18
B. 9
C. 10
D. 不确定
[单项选择]下列程序的输出结果是 #include"iostream" using namespace std; int Max(int a,int b) { if(a>b) return a; else return b; } void main( ) { int m,n; m=10,n=5; int max = Max(m,n); cout<<max<<endl; }
A. 10
B. 程序有误
C. 1
D. 0
[单项选择]执行如下程序将输出( ): #include<iostream> using namespace std; class Base { public: Base( ){cout<<"BB";fun( );} void fun ( ){tout<<"Brim";} }; class Derived:public Base { public: Derived( ){cout<<"DD";} void fun ( ){cout<<"Dfun";} }; int main( ){Derived d;return 0;}
A. DD
B. BBDfunDDDfun
C. BBBfunDD
D. DDBBBfun
[单项选择]有如下程序:
#include<iostream>
using namespace std;
class Base{
int x;
public:
Base(int n=0):x(n){cout<<n;)
int getX( )const{return x;}
};
class Derived:public Base{
int y;
public:
Derived(int m,int n):y(m,)Base(n){cout<<m;}
Derived(int m):y(m){cout<<m;}
};
int main( ){
Derived d1(3),d2(5,7)
return 0;
}
运行时的输出结果是
A. 375
B. 357
C. 0375
D. 0357
[填空题]下列程序的输出结果是 【13】 。
#include <iostream>
using namespace std;
int main( ) int data=1;
int &r = data;
data+=5;
r+=5;
cout<<data<<end1;
return 0;
[填空题]下列程序的输出结果是 【12】 。
#include <iostream>
using namespace std;
int main( ) int i=5;
int &r=i; r=7;
cout<<i<<end1;
return 0;
[填空题]下列程序的输出结果是 【15】 。
#include <iostream>
using namespace std;
class base
public:
int n;
base(int x) n=x;
virtual void set(int m) n=m; cout<<n<<’ ’;
;
class deriveA :public base
public:
deriveA(int x):base(x)
void set(int m) n+=m; cout<<n<<’ ’;
;
class derive B: public base
public:
derive B(int x):base(x)
void set(int m) n+=m; cout<<n<<’ ’;
;
int main( ) derive A, d1(1);
derive B, d2(3);
base *pbase;
pbase=&d1;
pbase->set(1);
pbase=&d2;
phase->set(2);
return 0;