课程《面向对象程序设计》_题库列表第21页_查题网

面向对象程序设计

截止01-05，该科目累计收录道题目。

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4[分析题] class my_ base{ int a,b; public: base(int x,int y) {a=x;b=y;} virtual void show(){ cout<<“base”; cout< } }； class my_class:public base{ int c: public: my_class(int x,int y,int z):my_base(x,y){c=z;} void show(){cout<<“my_class ”<<“c=”< } void main { my_base mb(50,50),*mp; my_class mc(10,20,30); mp=&mb; mp->show(); mp=&mc; mp->show(); }
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- 2022-12-13 21:17:49
5[分析题] class Base{ protected: int a;public:Base(int x,){a=x;}virtual void show(){ cout<<“base”<<endl; cout<<a<<“ “<<endl;}}；class my_class:public Base{int b:public: my_class(int x,int y): Base(x){ b=y;}void show(){ cout<<“my_class” <<“a=”<<a <<“b=”<<b;}};void main{Base ma(50),*mp;my_class mb(10,20);mp=&mb;mp->show();mp=&ma;mp->show();}
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7[分析题] #include<iostream.h> void main() { int a=2,b=5,c=4; if(a b>10)c=a*b;else c=3*a b; if(c<=20) cout<<c*c;else cout<<4 c-5; cout<<endl; a=a b;b=a b;c=a b c; cout<<”a,b,c=”<<a<<’,’<<b<<’,’<<c<<endl; }
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8[分析题] #include<iostream.h> void main() { int x=10,y=-1; cout<<((x>y)&&(y<0))<<’ ’; cout<<((x>y)||(y<0))<<’ ’; cout<<((x<=y)&&(y>=0))<<’ ’; cout<<((x<=y)||(y>=0))<<’ ’; cout<<((x==y)&&y)<<’ ’; cout<<((x==y)||y)<<’ ’; }
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9[分析题] #include<iostream.h> void main() { int x,y; x=5;y=6; cout<<”x y=”<<x y<<’,’; cout<<”x*y=”<<x*y<<endl; }
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10[分析题] #include <iostream.h>cass complex{ private: double real, image; complex( ) { real =0.0;image=0.0;}complex(double r, double i) { real =r; image=i; }void print(){cout<<real<<’ ’<<image<<’i’<<endl;}friend complex operator (complex col ,complex co2);}; complex operator (complex col ,complex co2) { complex temp; temp.real=col.real co2.real; temp.imag=col.imag co2.imag; return temp;}main(){ complex c1(1.1,2.2), c2(3.3,4.4), sum; c1.print(); sum=c1 c2; sum.print();}
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11[分析题] #include<iomanip.h> #include”abc.h” void main() { double a,b,c; double averageValue; a=2;b=3;c=4; averageValue=AVE(a,b,c); cout<<”averageValue;”<<averageValue<<endl; averageValue=AVE(a,b 1,c 2); cout<<”averageValue:”<<averageValue<<endl; }其中abc.h文件的内容如下： double AVE(double x,double y,double z) { return (x y z)/3; }
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- 2022-12-13 21:17:49
12[分析题] #include<iostream.h> void main() { cout<<sizeof(bool)<<’ ’<<sizeof(char)<<’ ’; cout<<sizeof(short)<<’ ’<<sizeof(int)<<’ ’; cout<<sizeof(long)<<’ ’<<sizeof(float)<<’ ’; cout<<sizeof(double)<<’ ’<<sizeof(long double)<<’ ’; cout<<sizeof(int *)<<’ ’<<sizeof(double *)<<’ ’; }
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13[分析题] #include ”iostream.h”class three{ int x,y,z; public: three(int a,int b,int c){ x=a;y=b;z=c;} friend ostream &operator<<(ostream &output, three ob); };ostream &operator<<(ostream &output, three ob){ output<<ob.x<<’,’<<ob.z<<’,’<<ob.y<<endl; return output;}main(){ three obj1(10,20,30); cout<<obj; three obj2(50,40,100);cout<<obj2; }
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14[分析题] #include “iostream.h” class A{ public: A( ) { cout<<”A begins” ; } ~A( ) { cout<<”A ends”; } void print( ) { cout<<”I am A”; } virtual void show() { cout<<”A is great”; } } }; class B :public A{ public: B( ) { cout<<”B begins” ; } ~B( ) { cout<<”B ends” ; } void print ( ) { cout<<”I am B” ; } void show() { cout<<”B is great” } }; void main( ) { A obj_b; A *p; p=new B; p->show(); p=&obj_b; p->print(); }
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- 2022-12-13 21:17:49