第六章 编程练习（6-9）

编程练习 6

#include <iostream>#include <string>using namespace std;struct donation {    string donor;    double amount;};int main(){    cout << "Enter the number of donor: ";    int num;    cin >> num;    if (num == 0)        cout << "No donor recorded";    else     {        cin.get();        donation *arrDonation = new donation[num];        donation *arrDonation2 = arrDonation ;        cout << "Enter the detail of eacy donor: " << endl;        for (int i=0; i< num; i++)        {            cout << "Donor #" << i+1 << " : ";            getline(cin,arrDonation2->donor);            cout << "Donor #" << i+1 << " donated: ";            cin >> arrDonation2->amount;            arrDonation2 ++;        }        arrDonation2 = arrDonation; // reset the pointer        // display Grand Patrons, both name and amount        cout << "The list below shows the Grand Patrons: " << endl;        int numGrand = 0;        for (int i=0; i< num; i++)        {            if (arrDonation2->amount > 10000)            {                cout << arrDonation2->donor << "\t" << arrDonation2->amount << endl;                numGrand++;            }            arrDonation2++;        }        if (numGrand ==0)            cout << "None" << endl;        arrDonation2 = arrDonation; // reset the pointer        // display Grand Patrons, both name and amount        cout << "The list below shows the name of Patrons: " << endl;        int numPatrons = 0;        for (int i=0; i< num; i++)        {            if (arrDonation2->amount <= 10000)            {                cout << arrDonation2->donor << endl;                numPatrons++;            }            arrDonation2++;        }        if (numPatrons ==0)            cout << "None" << endl;        cin.get();        //delete [] arrDonation;        //delete [] arrDonation2;    }    system("pause");    return 0;}

编程练习 7

#include <iostream>#include <cctype>using namespace std;const int Size = 20;int main(){    int vowels = 0;    int consonants = 0;    int others = 0;    char word[Size];    char ch;    cout << "Enter words (q to quit):" << endl;    cin >> word;    while(strcmp(word,"q"))    {        //cin >> word;        ch = word[0];        if(!isalpha(ch))            others++;        else if(ch=='a'||ch=='e'||ch=='i'||ch=='o'||ch=='u')              vowels++;          else              consonants++;         cin>>word;    }     cout << vowels << "  words beginning with vowels" << endl;      cout << consonants << " words beinning with consonants" << endl;      cout << others << " others" << endl;      system("pause");    return 0;}

编程练习 8

#include<iostream>  #include<fstream> using namespace std; int main()  {      ifstream inFile;      ifstream fin;      int count=0;      inFile.open("file.txt");       if(!inFile.is_open())      {          cout<<"Open Failed!"<<endl;      }      char ch;      inFile>>ch;      while(inFile.good())      {          count++;          inFile>>ch;      }      if(inFile.eof())      {          cout<<"count="<<count<<endl;      }      system("pause");      return 0;}

编程练习 9 就是把练习6从用户输入改成文件读取了，没舍特别的，这里就偷个懒了