C++习题整理1..docVIP

一，My Vector#include #include #include using namespace std;void DisplayVector(vector A);void main()vector a;int i;for(i=0;i10;i+)/a.push_back(i+1)*10);ai = (i+1)*10;cout向量?当獭?前的?元a素?为a:endl;DisplayVector(a);cout向量?当獭?前的?长度为a:a.size()endl;cout向量?当獭?前的?容量?为a:a.capacity()endl;vector:iterator p=a.begin()+2;a.erase(p);cout元a素?删?除y操作痢?完?成后的?向量?为a:endl;DisplayVector(a);cout向量?当獭?前的?长度为a:a.size()endl;cout向量?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?操作痢?完?成后的?向量?为a:endl;DisplayVector(a);cout向量?当獭?前的?长度为a:a.size()endl;cout向量?当獭?前的?容量?为a:a.capacity()endl;void DisplayVector(vector A)int i;for(i=0;iA.size();i+)coutsetw(5)leftAi;if (i+1)%5 = 0)coutendl;coutendl;二输出格式#include using namespace std;void main()couthex10 15n;coutdec;cout noshowpos12 155 showpos18n;cout 121 156endl;cout noshowpos;/宽度填?充?coutsetw(10)setfill($);cout2356789endl;coutsetw(7);cout56789endl;cout.width(10);cout.fill(S);cout23.012356endl;double d1=123.0, d2=1.2345;coutsetprecision(5)d1endl;coutshowpointsetprecision(5)d1endl;coutshowpointsetprecision(2)d1endl;coutnoshowpointsetprecision(2)d1endl;coutsetprecision(5)d2endl;coutsetprecision(3)d2endl;coutfixedsetprecision(3)d2endl;coutfixedsetprecision(7)d2endl;coutscientificsetprecision(3)d2endl;coutscientificsetprecision(7)d2endl;三文件#include #include #include using namespace std;void main()int i,temp;ifstream fin(abc.txt);ofstream fout(123.dat, ios:binary);if(fin != NULL & fout != NULL)fintemp;while(fin != NULL)fout.write(char *) &temp,sizeof(int);fintemp;elseif(fin = NULL)coutError:cannot open file abc.txt endl;if(fout = NULL)coutError: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)coutsetw(8)lefttemp;i+;if( i%10 = 0)coutendl;fin1.read( (char *) &temp, sizeof(int);if( i%10 != 0)coutendl;elsecoutError:cannot open file 123.dat endl;return;fin1.close();四考试#include#include#include#include#include#include#includeusing 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&A)ifstream in(d:input.txt);for(int i=0;ia.ID;;ina.WorkerYears;ina.Salary;A.push_back(a);void Sort(vector&Arr)int i,j; WORKER t;for(i=0;iArr.size()-1;i+)for(j=0;jArrj+1.name)t=Arrj;Arrj=Arrj+1;Arrj+1=t;void display(vector&A)int i;coutsetw(10)left工号?10)姓?名?setw(5)工龄?setprecision(1)工资哩?endl;for(i=0;iA.size();i+)coutsetw(10)leftAi.IDsetw(10)Asetw(5)Ai.WorkerYearssetprecision(1)Ai.Salaryendl;void Filter(vectorB,vectorA)int i;for(i=0;i=10)B.push_back(Ai);coutsetw(10)left工号?setw(10)姓?名?setw(5)工龄?setprecision(1)工资哩?endl;for(i=0;iB.size();i+)coutsetw(10)leftBi.IDsetw(10)Bsetw(5)Bi.WorkerYearssetprecision(1)Bi.Salaryendl;void Filter(vectorC,vectorA,int i)if(Ai.Salary=1500.0)C.push_back(Ai);coutsetw(10)left工号?setw(10)姓?名?setw(5)工龄?setprecision(1)工资哩?endl;for(i=0;iC.size();i+)coutsetw(10)leftCi.IDsetw(10)Csetw(5)Ci.WorkerYearssetprecision(1)Ci.Salaryendl;int main()vectorA;vectorB;vectorC;WORKER a;int i=0;read(a,A);Sort(A);display(A);Filter(B,A);Filter(C,A,i);return 0;五重载#include #include 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);int r3 = fun2(10);int &r4 = fun2(10);coutr1=r1endl;/coutr2=r2endl;coutr3=r3endl;r4 = 10;coutr4=r4endl; coutresult=resultendl;result = 201;coutresult=resultendl;coutr4=r4endl; return 0;六类#include #include using namespace std;class CSerialPortprivate:string Name;int Speed;int BufferLength;static int ComCounts;public: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(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=cserialport.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& com)o串?口名?称?：阰com.Nameendl;o串?口通?信?速率：阰com.Speedendl;return o;CSerialPort:CSerialPort()ComCounts-;int CSerialPort:ComCounts = 0;int main()CSerialPort portA;cout串?口portA为a: nportA;cout当獭?前创洹?建的?串?口个?数簓为a: CSerialPort:GetComCounts()nendl;CSerialPort portB(com5,4800, 1024);cout串?口portB为a: nportB;cout当獭?前创洹?建的?串?口个?数簓为a: CSerialPort:GetComCounts()nendl;+(+portB); / 连?续?前自?增?操作痢?cout两?次?前自?增?后，?串?口portB为a: nportB;cout当獭?前创洹?建的?串?口个?数簓为a: CSerialPort:GetComCounts()nendl;cout一?次?后自?增?后，?串?口portB为a: nportB+;cout一?次?后自?增?后，?串?口portB为a: nportB;cout当獭?前创洹?建的?串?口个?数簓为a: CSerialPort:GetComCounts()nendl;CSerialPort *ptr_portC = new CSerialPort;cout串?口portC为a:n*ptr_portC;cout当獭?前创洹?建的?串?口个?数簓为a: CSerialPort:GetComCounts()nendl;delete ptr_portC;cout删?除y串?口portC后，?当獭?前创洹?建的?串?口个?数簓为a: CSerialPort:GetComCounts()nendl;return 0;七、习题4#include#include#include#include#include#include#include#include#include#includeusing namespace std;struct Student int ID; / 学号?string name; / 姓?名?float score3; /三门?课?程成绩; void sort(vector &a)struct Student temp;int min;for (unsigned int i=0;ia.size();i+)min=i;for (unsigned int j=i;ja.size();j+)if (aj.IDai.ID)min=j;if (min!=i)temp=ai;ai=amin;amin=temp;cout排?序后的?学生?信?息为a：阰endl;for (unsigned int i=0;ia.size();i+)coutsetw(10)rightai.ID setw(10) setprecision(3)rightai.score0 setprecision(3)rightai.score1 setprecision(3)rightai.score2endl;return;void Delete(vector &a)ofstream out(res.dat,ios:binary);for (unsigned int i=0;ia.size();i+)if(=Tom)a.erase(a.begin()+i);for (unsigned int i=0;ia.size();i+)out.write(char*)&ai,sizeof(struct Student);out.close();return;int main()struct Student arr5;vector a;for (int i=0;i5;i+)cout输?入?学生?信?息：阰arri.IDarri.score0arri.score1arri.score2;for (unsigned int i=0;i5;i+)a.push_back(arri);sort(a);Delete(a);return 0;八习题3#include#include#include#include#include#include#includeusing namespace std;int main()vector a;a.push_back(Jua);a.push_back(Feb);a.push_back(Mar);a.push_back(Apr);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(); for ( unsigned int i = 0; i a.size(); i+ ) cout ai endl; return 0;9 习题2#include #include #includeusing 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(in1temp1)count+;out1.write(char*)&temp1,sizeof(int);in2.read(char*)&temp1,sizeof(int);out2setw(10)setfill(C)righttemp1;if (count%2=