1、C+笔试#include #include class Personprivate: char Name20; char Sex; int Age;public: void Register(char *name,int age,char sex); void ShowMe();void Person:Register(char *name,int age,char sex) strcpy(Name,name); Age = age; Sex = (sex=m?m:f);void Person:ShowMe() coutNametAgetSexendl;void main() char nam
2、e20; char sex; int age; Person person1,person2; coutnameagesex; person1.Register(name,age,sex); coutperson1:t:; person1.ShowMe(); person1.Register(Zhang3,19,m); coutperson1:t; person1.ShowMe(); person2=person1; coutperson2:t; person2.ShowMe();第一题 当输入“Wang5 18 f”之后的运行结果： 答案： Person1: wang5 18 f Perso
3、n2: zhang3 19 m Person2: zhang3 19 m第二题 读代码#include class Dateprivate: int day;int month;int year;public: Date(); Date(int,int,int); void init(int,int,int); void print_ymd(); void print_mdy();Date:Date() year = 1900;month= 1;day = 1;Date:Date(int yy,int mm,int dd) init(yy,mm,dd); void Date:init(int
4、yy,int mm,int dd) month = (mm=1&mm=1900&yy=1&dd=31)?dd:1;void Date:print_ymd() coutyear-month-dayendl;void Date:print_mdy() coutmonth-day-yearendl;void main() Date date1,date2(2013,13,13); date1.print_ymd(); date2.print_ymd(); date1.init(2013,12,13); date1.print_ymd(); date2.init(2012,12,33); date2.
5、print_ymd();答案： 1900-1-1 2013-1-13 2013-12-31 2013-12-1第三题 读代码 #include #include class Personprivate: char Name20; char Sex; int Age;public: void Register(char *name,int age,char sex) strcpy(Name,name); Age = age; Sex = (sex=m?m:f); void ShowMe() coutNametAgetSexendl; ;class Student:public Personpri
6、vate: int Number; char ClassName10;public: void RegisterStu(char *classname,int number,char *name,int age,char sex) strcpy(ClassName,classname); Number = number; Register(name,age,sex); void ShowStu() coutNumbertClassNameendl; ShowMe(); ;void main() Student stu; stu.RegisterStu(计算机51,85071011,张弓长,18
7、,m); stu.ShowStu();stu.ShowMe();答案：85071011 计算机51 张弓长 18 m张弓长 18 m第四题 读代码#include #include class Petpublic: virtual void Speak() coutHow does a pet speak?endl; ;class Cat:public Petpublic: virtual void Speak() coutmiao!miao!endl; ;class Dog:public Petpublic: virtual void Speak() coutwang!wang!Speak(
8、); p1 = &dog1; p1-Speak(); Pet &p4 = cat1; p4.Speak();答案：How does a pet speak?Miao!miao!Wang!wang!Miao!miao!多态性：基类的指针指向子类对象；子类的对象给基类的引用赋值第五题 读代码 #include void testfun(int StudentAge) try if(StudentAge 20) throw StudentAge; cout 学生年龄是： StudentAge endl; catch(int i) cout 发生异常：学生年龄是 i 岁，太大了! endl; catc
9、h(const char* Message) cout 发生异常： Message endl; void main() testfun(12); testfun(-9); testfun(99);答案：学生年龄是：12发生异常：输入的学生年龄必修是正整数！发生异常：学生年龄是99岁，太大了！第六题 填空题#include #include using namespace std;int main(int argc, char *argv) char ch; if(argc!=2) cout Usage: ProgramName n; return 1; ifstream in(argv1, i
10、os:in | ios:binary); if(（1）) cout Cannot open the file.; return 1; while(（2）) / in will be false when eof is reached in.get(ch); if(in) cout （3）; return 0;答案： (1)！in (2)!in.eof() (或 in) (3)ch第七题 填空题#include using namespace std; template T Power(T a, int exp) while(-exp0) ans*=a; return (2) ; 以下为参考：i
11、nt main() cout 35= Power(3, 5) endl; cout 1.12= Power(1.1, 2) endl; return 0; 答案：(1)Typename T （或 Class T ）(2)T ans = a;第八题 读代码#include#includeusing namespace std;class Person char Name10; /姓名int Age; /年龄public: Person(char* name,int age) strcpy(Name, name); Age = age; coutconstructor of personNamee
12、ndl; Person() coutdeconstrutor of personNameendl;class Student : public Person char ClassName10; /班级 Person Monitor; /班长public: Student(char *name, int age, char *classname, char *name1, int age1) : Person(name, age) , Monitor(name1, age1) strcpy(ClassName, classname); coutconstructor of Student end
13、l; Student() coutdeconstrucor of Student endl; ;int main() Student stu(XiaoLi,18,计算机51,XiaoWang,20); return 0;答案：Constructor of person XiaoLiConstructor of person XiaoWangConstructor of person deconstructor of person deconstructor of person XiaoWangdeconstructor of person XiaoLi父亲-朋友-自己（构造）自己-朋友-父亲
14、（析构）第九题 读代码#include #include using namespace std;class Person protected: char Name10; char Sex; int Age;public:void Register(char *name,int age,char sex) strcpy(Name, name); Sex= (sex=m? m: f ); Age = age; void ShowMe() cout 姓 名：Nameendl; cout 性 别：(Sex=m?男:女)endl; cout 年 龄：Ageendl; ;class Teacher :
15、public Person char Dept20; int Salary;public: Teacher(char *name,int age,char sex,char *dept,int salary); void ShowMe() Person:ShowMe(); cout 工作单位：Deptendl; cout 月 薪：Salaryendlendl; ;Teacher:Teacher(char *name,int age,char sex,char *dept,int salary) Register(name,age,sex); strcpy(Dept, dept); Salary
16、 = salary;class Student : public Person char ID12; char Class12;public: Student(char *name,int age,char sex, char *id,char *classid); void ShowMe() cout 学 号：IDendl; Person:ShowMe(); cout 班 级：Classnn;Student:Student(char *name,int age,char sex,char *id,char *classid) Register(name,age,sex); strcpy(ID
17、, id); strcpy(Class, classid);int main() Teacher emp1(章立早,38,m,电信学院,2300); Student std1(李木子,22,f,02035003,能动01); emp1.ShowMe(); std1.ShowMe(); return 0;答案：姓名：章立早性别：男年龄：38工作单位：电信学院月薪：2300学号：02035003姓名：李木子性别：女年龄：22班级：能动01第十题 填空题#include using namespace std; template T sum(T a,int n) int i; （1） ; for(i
18、=0; i=n;i+) s=s+ai; （2） ;答案：（1）T s = 0 （2）return s;第十一题 填空题下面程序的功能是输入两个数作除法，当输入的数位数是0时作异常处理#include using namespace std; double Div(double a, double b);int main() double n1, n2, result; coutInput two numbers:n1n2; （1） ; result=Div(n1,n2); coutn1/n2=resultendl; catch(double x) cout Exception : attemp
19、ted to divide by x!endl; return 0;double Div(double a, double b) if(b=0.0) （2） ; return （3） ;答案：（1）Try（2）throw b （3）a/b第十二题 读代码如果将下面的程序编译成可执行文件，当前目录下有一个test.txt文本文件，里面的内容如下两行：HelloWhat you see maybe wrong那么执行结果是？#include #include using namespace std;int main() ifstream in(test.txt); char ch; if(!in)
20、 cout Cannot open grade file.n; return 1; while(in) in.get(ch); if(in) coutch; return 0;（1） 用面向对象的方法编写程序求圆柱体的周长和面积#include using namespace std;class yztprivate: double r; double h;public: yzt(double dr,double dh) r = dr; h = dh; double area() return 2*3.1416*r*(h+r); double volume() return 3.1416*r*
21、r*h; void print() cout周长为：area()endl; cout面积为：volume()endl; ;void main() yzt t(3,3); t.print();（2） 用面向对象的方法编写程序求长方形的周长和面积#include using namespace std;class cftprivate: double l; double w;public: cft(double dl,double dw) l = dl; w = dw; double zc() return 2*l+2*w; double mj() return l*w; void print()
22、 cout周长为：zc()endl; cout面积为：mj()endl; ;void main() cft t(3,4); t.print();（3）运算符重载,友元函数重载,实部虚部计算 #include using namespace std;class complexprivate: double real; double imag;public: complex(double r=0,double i=0); friend complex operator+(const complex c1,const complex c2); void print();complex:complex(double r,double i) real = r; imag = i;complex operator+(const complex c1,const complex c2) complex temp; temp.real = c1.real+c2.real; temp.imag = c1.imag+c2.imag; return temp;void complex:print() cout(real,imag)endl;void main() complex c1(2.5,3.7),c2(4.2,6.5); complex c; c = c1+c2; c.print();
