北邮信通C++上机实验 第七章.docx
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北邮信通C++上机实验 第七章.docx
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北邮信通C++上机实验第七章
第七章实验题
一.基础题
1.
#include
usingnamespacestd;
classCSample{
doublea;
CSample()
{a=2.5;};
public:
CSample(intval);
~CSample();};
2.
#include
usingnamespacestd;
classcube
{
public:
cube();//构造函数
~cube();//析构函数
intvolume();//定义整形函数
private:
intheight,width,depth;//定义私有数据成员
};
cube:
:
cube()
{
height=100;
depth=4;
width=2;
cout<<"Constructorcalled."< } cube: : ~cube() { cout<<"Destructorcalled."< system("pause"); } intcube: : volume() { returnheight*width*depth; } voidmain() { cubecubeone;//定义对象 cout<<"立方体的体积为: "< system("pause"); } 3. #include usingnamespacestd; classCCounter { intvalue; public: CCounter() { cout<<"CCounterConstructor1"< value=0; } CCounter(intval) { cout<<"CCounterConstructor2"< value=val; } ~CCounter() { cout<<"CCounterDestructor"< system("pause"); } }; classCExample { intvalue; public: CCountercar; CExample() { cout<<"CExampleConstructor1"< value=0; } CExample(intval) { cout<<"CExampleConstructor2"< value=val; } ~CExample() { cout<<"CExampleDestructor"< system("pause"); } voidDisplay(){cout<<"value="< }; voidmain() { CExampleobj(350); obj.Display(); system("pause"); } //调用顺序: CCounter()-CExample(intval)-~CExample()-~CCounter() 4. #include usingnamespacestd; classPoint { protected: intx; public: intGetx(){returnx;} intY; voidinit(inta,intb){x=a;Y=b;} intGety(){returnY;} voidSetx(inta){x=a;} voidSety(intb){Y=b;} }; voidmain() { PointA,B; A.init(25,27); B.init(29,31); cout<<"A.x="< cout<<"B.x="< cout<<"A.Y="< cout<<"A.y="< cout<<"B.y="< cout<<"B.y="< system("pause"); } 5. #include usingnamespacestd; classbase { private: inti; staticintk;//定义静态变量k public: base(){i=0;k++;}//定义构造函数 voidDisplay(); }; voidbase: : Display() { k=k+10; i++; cout<<"i="< } intbase: : k=0;//初始化k的值 voidmain() { basea,b; a.Display(); b.Display(); system("pause"); } 运行结果为: i=1;k=12 i=1;k=22 二.编程题 1. { if(x>0) { cout<<"It'sapositivenumber"< positive++; } elseif(x==0) { zero++; cout<<"It'szero"< } else { negative++; cout<<"It'sanegativenumber"< } } intnum: : positive=0; intnum: : negative=0; intnum: : zero=0; voidmain() { intn; while(cin>>n) { numtest(n); test.decision(); test.print(); } system("pause"); } 2. #include usingnamespacestd; classdianqi { public: voidgetprice(intx,inty,intz) { colorcast=x; ridge=y; washer=z; }; voidtotal(inta,intb,intc) { intt=a*colorcast+b*ridge+c*washer; cout< }; private: intcolorcast; intridge; intwasher; }; voidmain() { dianqidian; dian.getprice(4200,2800,1500); cout<<"请分别输入彩电,冰箱,洗衣机的销售数量: "; inta=0,b=0,c=0; cin>>a; cout<<""; cin>>b; cout<<""; cin>>c; cout< cout<<"总营业额为: "; dian.total(a,b,c); system("pause"); } 3. #include #include usingnamespacestd; classcar { public: voiddisp_parameters() { cout<<"型号: "< cout<<"颜色: "< cout<<"车门数: "< cout<<"座位数: "< cout<<"轴距: "< } voidchange(stringa,charb,intc,intd,inte) { type=a; colour=b; door=c; seat=d; distance=e; } private: stringtype; charcolour; intdoor; intseat; intdistance; }; voidmain() { cargundam; gundam.change("DoubleOGUNDAM",'b',1,5,6); gundam.disp_parameters(); system("pause"); } 4. #include usingnamespacestd; classstudent { public: intnum; charname[20]; charsex; intage; }; voidmain() { studentstu[5]; studenttemp; for(inti=0;i<5;i++) { cout<<"输入第"< "; cin>>stu[i].num; cout<<"输入第"< "; cin>>stu[i].name; cout<<"输入第"< "; cin>>stu[i].sex; cout<<"输入第"< "; cin>>stu[i].age; } for(inta=1;a<5;a++) { for(intb=0;b<5-a;b++) { if(stu[b].age { temp.age=stu[b+1].age; stu[b+1].age=stu[b].age; stu[b].age=temp.age; } } } for(inti=0;i<5;i++) cout<<"num: "< "< "< "< system("pause"); } 5. #include usingnamespacestd; classATM { public: voids_balance(void) { cout<<"Thebalanceis"< } voiddeposit(floata) { balance+=a; } voidwithdraw(floata) { balance-=a; } intchecking(inta) { if(key==a) return1; else return0; } private: intkey=328; staticfloatbalance; }; floatATM: : balance=0.0f; voidmain() { ATMsys1; intk,m; floatnum; cout<<"Pleaseinputthekey: "; cin>>k; if(sys1.checking(k)! =1) cout<<"Error"< else { cout<<"Pleasechoosethefunction: "< " (1)Depositingmoney"< " (2)Withdrawingmoney"< "(3)Checkthebalance"< while(cin>>m) { switch(m) { case1: cout<<"Pleaseinputhowmuchyouwanttodeposit: "; cin>>num; sys1.deposit(num); cout<<"Youhavedeposited"< sys1.s_balance(); cout<<"Pleasechoosethefunction: "< " (1)Depositingmoney"< " (2)Withdrawingmoney"< "(3)Checkthebalance"< break; case2: cout<<"Pleaseinputhowmuchyouwanttowithdraw: "; cin>>num; sys1.withdraw(num); cout<<"Youhavewithdrawed"< sys1.s_balance(); cout<<"Pleasechoosethefunction: "< " (1)Depositingmoney"< " (2)Withdrawingmoney"< "(3)Checkthebalance"< break; case3: sys1.s_balance(); cout<<"Pleasechoosethefunction: "< " (1)Depositingmoney"< " (2)Withdrawingmoney"< "(3)Checkthebalance"< break; case4: cout<<"Pleasechoosethefunction: "< " (1)Depositingmoney"< " (2)Withdrawingmoney"< "(3)Checkthebalance"< break; default: cout<<"Error1"< break; } } } system("pause"); } 6. #include #include usingnamespacestd; classstudent {public: friendvoidsort(student&a,student&b,student&temp); voidchange(stringa,intb,floatc) { name=a; num=b; score=c; } floatshow() { returnscore; } private: intnum; stringname; floatscore; }; voidsort(student&a,student&b,student&temp) { if(a.score { temp=a; a=b; b=temp; } } voidmain() { studentstu[5]; studenttemp; stringq=""; intw=0; floate=0.0f; for(inti=0;i<5;i++) { cout<<"输入第"< "< cout<<"姓名: "; cin>>q; cout<<"学号: "; cin>>w; cout<<"成绩: "; cin>>e; stu[i].change(q,w,e); cout< } for(inti=1;i<5;i++) { for(intj=0;j<(5-i);j++) { sort(stu[j],stu[j+1],temp); } } cout<<"最高分"< cout<<"最低分"< system("pause"); }
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