第11章谭浩强C++习题及解答（课堂PPT）

习题1.将例11.1的程序片段补充和改写成一个完整、正确的程序，用公有继承方式。在程序中应包括输入数据的函数，在程序运行时输入num,name,sex,age,addr的值，程序应输出以上5个数据的值。,1,#include#includeusingnamespacestd;classStudentpublic:voidget_value()coutnumnamesex;voiddisplay()coutnum:numendl;coutname:nameendl;coutsex:sexaddr;voiddisplay_1()display();coutage:ageendl;coutaddress:addrnamesex;voiddisplay()coutnum:numendl;coutname:nameendl;coutsex:sexaddr;voiddisplay_1()display();coutage:ageendl;coutaddress:addrnamesex;voiddisplay()coutnum:numendl;coutname:nameendl;coutsex:sexnamesexageaddr;voiddisplay_1()display();coutage:ageendl;coutaddress:addrnamesex;voiddisplay()coutnum:numendl;coutname:nameendl;coutsex:sexaddr;voiddisplay_1()coutage:ageendl;coutaddress:addrnamesex;voiddisplay()coutnum:numendl;coutname:nameendl;coutsex:sexnamesexageaddr;voiddisplay_1()display();coutage:ageendl;coutaddress:addrendl;private:intage;stringaddr;,18,intmain()Student1stud;stud.get_value1();stud.display_1();return0;,19,5.有以下程序结构，请分析访问属性。classA/A为基类public:voidf1();inti;protected:voidf2();intj;private:intk;,20,classB:publicA/B为A的公用派生类public:voidf3();protected:intm;private:intn;,21,classC:publicB/C为B的公用派生类public:voidf4();private:intp;intmain()Aa1;/a1是基类A的对象Bb1;/b1是派生类B的对象Cc1;/c1是派生类C的对象return0;,22,问:(1)在main函数中能否用b1.i,b1.j和b1.k引用派生类B对象b1中基类A的成员？(2)派生类B中的成员函数能否调用基类A中的成员函数f1和f2？(3)派生类B中的成员函数能否引用基类A中的数据成员i,j,k？,23,(4)能否在main函数中用c1.i,c1.j,c1.k,c1.m,c1.n,c1.p引用基类A的成员i,j,k，派生类B的成员m,n，以及派生类C的成员p？(5)能否在main函数中用c1.f1(),c1.f2(),c1.f3()和c1.f4()调用f1,f2,f3,f4成员函数？(6)派生类C的成员函数f4能否调用基类A中的成员函数f1,f2和派生类中的成员函数f3？,24,6.有以下程序结构，请分析所有成员在各类的范围内的访问权限。classApublic:voidf1();protected:voidf2();private:inti;,25,classB:publicApublic:voidf3();intk;private:intm;classC:protectedBpublic:voidf4();protected:intm;private:intn;,26,classD:privateCpublic:voidf5();protected:intp;private:intq;intmain()Aa1;Bb1;Cc1;Dd1;,27,7.有以下程序，请完成下面工作:阅读程序，写出运行时输出的结果。然后上机运行，验证结果是否正确。分析程序执行过程，尤其是调用构造函数的过程。,28,#includeusingnamespacestd;classApublic:/A()a=0;b=0;/A(inti)a=i;b=0;A(inti=0,intj=0)a=i;b=j;voiddisplay()couta=ab=b;private:inta,b;,29,classB:publicApublic:/B()c=0;/B(inti):A(i)c=0;/B(inti,intj):A(i,j)c=0;B(inti=0,intj=0,intk=0):A(i,j)c=k;voiddisplay1()display();coutc=cendl;private:intc;,30,intmain()Bb1;Bb2(1);Bb3(1,3);Bb4(1,3,5);b1.display1();b2.display1();b3.display1();b4.display1();return0;,31,运行结果如下：a=0b=0c=0a=1b=0c=0a=1b=3c=0a=1b=3c=5,32,8.有以下程序，请完成下面工作:阅读程序，写出运行时输出的结果。然后上机运行，验证结果是否正确。分析程序执行过程，尤其是调用构造函数和析构函数的过程。,33,#includeusingnamespacestd;classApublic:A()coutconstructingAendl;A()coutdestructingAendl;,34,classB:publicApublic:B()coutconstructingBendl;B()coutdestructingBendl;classC:publicBpublic:C()coutconstructingCendl;C()coutdestructingCendl;intmain()Cc1;return0;,35,运行结果如下：constructingAconstructingBconstructingCdestructingCdestructingBdestructingA,36,9.分别定义Teacher(教师)类和Cadre(干部)类，采用多重继承方式由这两个类派生出新类Teacher_Cadre(教师兼干部)。要求:在两个基类中都包含姓名、年龄、性别、地址、电话等数据成员。在Teacher类中还包含数据成员title(职称)，在Cadre类中还包含数据成员post(职务)，在Teacher_Cadre类中还包含数据成员wage(工资)。,37,对两个基类中的姓名、年龄、性别、地址、电话等数据成员用相同的名字，在引用这些数据成员时，指定作用域。在类体中声明成员函数，在类外定义成员函数。在派生类Teacher_Cadre的成员函数show中调用Teacher类中的display函数，输出姓名、年龄、性别、职称、地址、电话，然后再用cout语句输出职务与工资。,38,#include#includeusingnamespacestd;classTeacherpublic:Teacher(stringnam,inta,chars,stringtit,stringad,stringt);voiddisplay();protected:stringname;intage;charsex;stringtitle,addr,tel;,39,Teacher:Teacher(stringnam,inta,chars,stringtit,stringad,stringt):name(nam),age(a),sex(s),title(tit),addr(ad),tel(t)voidTeacher:display()coutname:nameendl;coutageageendl;coutsex:sexendl;couttitle:titleendl;coutaddress:addrendl;couttel:telendl;,40,classCadrepublic:Cadre(stringnam,inta,chars,stringp,stringad,stringt);voiddisplay();protected:stringname;intage;charsex;stringpost,addr,tel;,41,Cadre:Cadre(stringnam,inta,chars,stringp,stringad,stringt):name(nam),age(a),sex(s),post(p),addr(ad),tel(t)voidCadre:display()coutname:nameendl;coutage:ageendl;coutsex:sexendl;coutpost:postendl;coutaddress:addrendl;couttel:telendl;,42,classTeacher_Cadre:publicTeacher,publicCadrepublic:Teacher_Cadre(stringnam,inta,chars,stringtit,stringp,stringad,stringt,floatw);voidshow();private:floatwage;,43,Teacher_Cadre:Teacher_Cadre(stringnam,inta,chars,stringt,stringp,stringad,stringtel,floatw):Teacher(nam,a,s,t,ad,tel),Cadre(nam,a,s,p,ad,tel)wage=w;voidTeacher_Cadre:show()Teacher:display();coutpost:postendl;coutwage:wageendl;,44,intmain()Teacher_Cadrete_ca(Wang-li,50,f,prof.,president,135BeijingRoad,Shanghai,(021)61234567,1534.5);te_ca.show();return0;,45,10.将本章11.8节中的程序片段加以补充完善，成为一个完整的程序。在程序中使用继承和组合。在定义Professor类对象prof1时给出所有数据的初值，然后修改prof1的生日数据，最后输出prof1的全部最新数据。,46,classTeacher/教师类public:Teacher(intn,stringnam,chars)num=n;name=nam;sex=s;voiddisplay()/定义输出函数coutnum:numendl;coutname:nameendl;coutsex:sexendl;private:intnum;stringname;charsex;,47,classBirthDate/生日类public:BirthDate(inty,intm,intd)year=y;month=m;day=d;voiddisplay()/输出函数coutbirthday:year-month-dayendl;voidchange(inty,intm,intd)/修改生日year=y;month=m;day=d;private:intyear,month,day;,48,classProfessor:publicTeacher/教授类public:Professor(intn,stringnam,chars,inty,intm,intd,floatw):Teacher(n,nam,s),b1(y,m,d)wage=w;voiddisplay();/输出函数voidchange(int,int,int);/修改函数private:floatwage;/工资BirthDateb1;/对象成员;,49,voidProfessor:display()/输出函数Teacher:display();b1.display();coutwage:wageendl;voidProfessor:change(inty,intm,intd)/定义修改函数b1.change(y,m,d);/若year=y;month=m;day=d;/错误/或b1.year=y;b1.month=m;./错误,50,