C++习题整理1.1

1、一，My Vector#include <iostream>#include <iomanip>#include <vector>using namespace std;void DisplayVector(vector<int> A);void main()vector<int> a;int i;for(i=0;i<10;i+)/a.push_back(i+1)*10);ai = (i+1)*10;cout<<"向ò量?当獭?前°的?元a素?为a:"<<endl;

2、DisplayVector(a);cout<<"向ò量?当獭?前°的?长¤度è为a:"<<a.size()<<endl;cout<<"向ò量?当獭?前°的?容量?为a:"<<a.capacity()<<endl;vector<int>:iterator p=a.begin()+2;a.erase(p);cout<<"元a素?删?除y操ù作痢?完?成é后ó的?向&

3、#242;量?为a:"<<endl;DisplayVector(a);cout<<"向ò量?当獭?前°的?长¤度è为a:"<<a.size()<<endl;cout<<"向ò量?当獭?前°的?容量?为a:"<<a.capacity()<<endl;p=a.begin()+2;a.insert(p,20,3);cout<<"元a素?插?入?操ù作痢?完?成é后&#

4、243;的?向ò量?为a:"<<endl;DisplayVector(a);cout<<"向ò量?当獭?前°的?长¤度è为a:"<<a.size()<<endl;cout<<"向ò量?当獭?前°的?容量?为a:"<<a.capacity()<<endl;void DisplayVector(vector<int> A)int i;for(i=0;i<A.size();i+)c

5、out<<setw(5)<<left<<Ai;if (i+1)%5 = 0)cout<<endl;cout<<endl;二输出格式#include <iomanip>using namespace std;void main()cout<<hex<<10<<" "<<15<<'n'cout<<dec;cout <<noshowpos<<12<<' '<<

6、155<<' '<<showpos<<18<<"n"cout <<121<<' '<<156<<endl;cout <<noshowpos;/宽í度è填?充?cout<<setw(10)<<setfill('$');cout<<23<<56<<789<<endl;cout<<setw(7);cout<<56

7、<<789<<endl;cout.width(10);cout.fill('S');cout<<23.01<<23<<56<<endl;double d1=123.0, d2=1.2345;cout<<setprecision(5)<<d1<<endl;cout<<showpoint<<setprecision(5)<<d1<<endl;cout<<showpoint<<setprecision(2)

8、<<d1<<endl;cout<<noshowpoint<<setprecision(2)<<d1<<endl;cout<<setprecision(5)<<d2<<endl;cout<<setprecision(3)<<d2<<endl;cout<<fixed<<setprecision(3)<<d2<<endl;cout<<fixed<<setprecision(7)<&

9、lt;d2<<endl;cout<<scientific<<setprecision(3)<<d2<<endl;cout<<scientific<<setprecision(7)<<d2<<endl;三文件#include <fstream>#include <iostream>#include <iomanip>using namespace std;void main()int i,temp;ifstream fin("abc.txt&q

10、uot;);ofstream fout("123.dat", ios:binary);if(fin != NULL && fout != NULL)fin>>temp;while(fin != NULL)fout.write(char *) &temp,sizeof(int);fin>>temp;elseif(fin = NULL)cout<<"Error:cannot open file 'abc.txt' "<<endl;if(fout = NULL)cout&l

11、t;<"Error:cannot open file '123.dat' "<<endl;return;fin.close();fout.close();ifstream fin1("123.dat",ios:binary);if(fin1 != NULL)i=0;fin1.read( (char *) &temp, sizeof(int);while (fin1 != NULL)cout<<setw(8)<<left<<temp;i+;if( i%10 = 0)cout<

12、;<endl;fin1.read( (char *) &temp, sizeof(int);if( i%10 != 0)cout<<endl;elsecout<<"Error:cannot open file '123.dat' "<<endl;return;fin1.close();四考试#include<iostream>#include<fstream>#include<sstream>#include<vector>#include<iomanip

13、>#include<algorithm>#include<string>using namespace std;typedef structint ID; /工¤号?string name; /姓?名?int WorkerYears; /工¤龄?float Salary; /工¤资哩?WORKER;void read(WORKER a,vector<WORKER>&A)ifstream in("d:input.txt");for(int i=0;i<7;i+)in>>a.ID;

14、in>>;in>>a.WorkerYears;in>>a.Salary;A.push_back(a);void Sort(vector<WORKER>&Arr)int i,j; WORKER t;for(i=0;i<Arr.size()-1;i+)for(j=0;j<Arr.size()-1-i;j+)if(A>Arrj+1.name)t=Arrj;Arrj=Arrj+1;Arrj+1=t;void display(vector<WORKER>&A)int i;cout&l

15、t;<setw(10)<<left<<"工¤号?"<<10)<<"姓?名?"<<setw(5)<<"工¤龄?"<<setprecision(1)<<"工¤资哩?<<endl;for(i=0;i<A.size();i+)cout<<setw(10)<<left<<Ai.ID<<setw(10)<<A<&

16、lt;setw(5)<<Ai.WorkerYears<<setprecision(1)<<Ai.Salary<<endl;void Filter(vector<WORKER>B,vector<WORKER>A)int i;for(i=0;i<A.size();i+)if(Ai.WorkerYears>=10)B.push_back(Ai);cout<<setw(10)<<left<<"工¤号?"<<setw(10)<<&q

17、uot;姓?名?"<<setw(5)<<"工¤龄?"<<setprecision(1)<<"工¤资哩?<<endl;for(i=0;i<B.size();i+)cout<<setw(10)<<left<<Bi.ID<<setw(10)<<B<<setw(5)<<Bi.WorkerYears<<setprecision(1)<<Bi.Salary<

18、<endl;void Filter(vector<WORKER>C,vector<WORKER>A,int i)if(Ai.Salary>=1500.0)C.push_back(Ai);cout<<setw(10)<<left<<"工¤号?"<<setw(10)<<"姓?名?"<<setw(5)<<"工¤龄?"<<setprecision(1)<<"工¤

19、资哩?<<endl;for(i=0;i<C.size();i+)cout<<setw(10)<<left<<Ci.ID<<setw(10)<<C<<setw(5)<<Ci.WorkerYears<<setprecision(1)<<Ci.Salary<<endl;int main()vector<WORKER>A;vector<WORKER>B;vector<WORKER>C;WORKER a;int i=0;

20、read(a,A);Sort(A);display(A);Filter(B,A);Filter(C,A,i);return 0;五重载#include <iostream>#include <string>using namespace std;int result;int fun1(int i)result = i*i;return result;int& fun2(int i)int result;result = i*i;return result;int main()int r1 = fun1(10);/int &r2 = fun1(10);in

21、t r3 = fun2(10);int &r4 = fun2(10);cout<<"r1="<<r1<<endl;/cout<<"r2="<<r2<<endl;cout<<"r3="<<r3<<endl;r4 = 10;cout<<"r4="<<r4<<endl; cout<<"result="<<result<&l

22、t;endl;result = 201;cout<<"result="<<result<<endl;cout<<"r4="<<r4<<endl; return 0;六类#include <iostream>#include <string>using namespace std;class CSerialPortprivate:string Name;int Speed;int BufferLength;static int ComCounts;public:

23、CSerialPort(string name="com1",int speed=9600,int bufferlength=500);CSerialPort(const CSerialPort& cserialport);static int GetComCounts();friend CSerialPort& operator+(CSerialPort& com);friend CSerialPort operator+(CSerialPort& com,int);friend ostream& operator<<(

24、ostream& o,const CSerialPort& com);CSerialPort();CSerialPort:CSerialPort(string name,int speed,int bufferlength)Name=name;Speed=speed;BufferLength=bufferlength;ComCounts+;CSerialPort:CSerialPort(const CSerialPort& cserialport)Name=cserialport.Name;Speed=cserialport.Speed;BufferLength=cse

25、rialport.BufferLength;ComCounts+;int CSerialPort:GetComCounts()return ComCounts;CSerialPort& operator+(CSerialPort& com)com.Speed+;return com;CSerialPort operator+(CSerialPort& com,int)CSerialPort a(com);com.Speed+;return a;ostream& operator<<(ostream& o,const CSerialPort&a

26、mp; com)o<<"串?口ú名?称?：阰"<<com.Name<<endl;o<<"串?口ú通?信?速ù率ê：阰"<<com.Speed<<endl;return o;CSerialPort:CSerialPort()ComCounts-;int CSerialPort:ComCounts = 0;int main()CSerialPort portA;cout<<"串?口úportA为a: n"&

27、lt;<portA;cout<<"当獭?前°创洹?建¨的?串?口ú个?数簓为a: "<<CSerialPort:GetComCounts()<<"n"<<endl;CSerialPort portB("com5",4800, 1024);cout<<"串?口úportB为a: n"<<portB;cout<<"当獭?前°创洹?建¨的?串?口ú个?数

28、簓为a: "<<CSerialPort:GetComCounts()<<"n"<<endl;+(+portB); / 连?续?前°自?增?操ù作痢?cout<<"两?次?前°自?增?后ó，?串?口úportB为a: n"<<portB;cout<<"当獭?前°创洹?建¨的?串?口ú个?数簓为a: "<<CSerialPort:GetComCounts()<&

29、lt;"n"<<endl;cout<<"一?次?后ó自?增?后ó，?串?口úportB为a: n"<<portB+;cout<<"一?次?后ó自?增?后ó，?串?口úportB为a: n"<<portB;cout<<"当獭?前°创洹?建¨的?串?口ú个?数簓为a: "<<CSerialPort:GetComCounts()<<&qu

30、ot;n"<<endl;CSerialPort *ptr_portC = new CSerialPort;cout<<"串?口úportC为a:n"<<*ptr_portC;cout<<"当獭?前°创洹?建¨的?串?口ú个?数簓为a: "<<CSerialPort:GetComCounts()<<"n"<<endl;delete ptr_portC;cout<<"删?除y串?口&#

31、250;portC后ó，?当獭?前°创洹?建¨的?串?口ú个?数簓为a: "<<CSerialPort:GetComCounts()<<"n"<<endl;return 0;七、习题4#include<algorithm>#include<iostream>#include<fstream>#include<string>#include<cmath>#include<iomanip>#include<vecto

32、r>#include<deque>#include<functional>#include<iomanip>using namespace std;struct Student int ID; / 学§号?string name; / 姓?名?float score3; /三门?课?程ì成é绩¨ void sort(vector<struct Student> &a)struct Student temp;int min;for (unsigned int i=0;i<a.size();

33、i+)min=i;for (unsigned int j=i;j<a.size();j+)if (aj.ID<ai.ID)min=j;if (min!=i)temp=ai;ai=amin;amin=temp;cout<<"排?序ò后ó的?学§生?信?息为a：阰"<<endl;for (unsigned int i=0;i<a.size();i+)cout<<setw(10)<<right<<ai.ID<<" "<<setw(

34、10)<<right<<<<" "<<setprecision(3)<<right<<ai.score0<<" "<<setprecision(3)<<right<<ai.score1<<" "<<setprecision(3)<<right<<ai.score2<<endl;return;void Delete(vector<struc

35、t Student> &a)ofstream out("res.dat",ios:binary);for (unsigned int i=0;i<a.size();i+)if(="Tom")a.erase(a.begin()+i);for (unsigned int i=0;i<a.size();i+)out.write(char*)&ai,sizeof(struct Student);out.close();return;int main()struct Student arr5;vector<st

36、ruct Student> a;for (int i=0;i<5;i+)cout<<"输?入?学§生?信?息：阰"<<endl;cin>>arri.ID>>>>arri.score0>>arri.score1>>arri.score2;for (unsigned int i=0;i<5;i+)a.push_back(arri);sort(a);Delete(a);return 0;八习题3#include<iostream>#incl

37、ude<string>#include<iomanip>#include<vector>#include<time.h>#include<functional>#include<algorithm>using namespace std;int main()vector<string> a;a.push_back("Jua");a.push_back("Feb");a.push_back("Mar");a.push_back("Apr&quo

38、t;);a.push_back("May");a.push_back("Jun");a.push_back("Jul");a.push_back("Aug");a.push_back("Sep");a.push_back("Oct");a.push_back("Nov");a.push_back("Dec");sort(a.begin(),a.end(),less<string>(); for ( unsigned int

39、i = 0; i < a.size(); i+ ) cout << ai << endl; return 0;9 习题2#include <iostream>#include <fstream>#include<iomanip>using namespace std;int main()ifstream in1("Data.txt");ifstream in2("Res.dat",ios:binary);ofstream out1("Res.dat",ios:binary);ofstream out2("Res.txt");int temp1,count=0;while(in1>>temp1)count+;out1.write(char*)&temp1,sizeof(int);in2.read(char*)&temp1,sizeof(int);out2<<setw(10)<<setfill('C')<<right<<temp1;if (count%2=0)out2<&