C++ primer plus 练习7.9

来源：互联网发布：淘宝好评能修改吗编辑：程序博客网时间：2024/06/07 05:04

(提前声明，以下皆为我自己做题时所记录，方便以后查看，当然也希望大家一起来观看并指出我的错误。）

#include<iostream>

using namespace std;

const int c_nSLEN = 30;

struct student{
   char fullname[c_nSLEN];
   char hobby[c_nSLEN];
   int nOoplevel;
};

int fnGetinfo(student sta[], int n);

void fnDisplay1(student st);

void fnDisplay2(const student* pst);

void fnDisplay3(const student* pst,int n);

int main()
{
   cout << "Enter class size: ";
   int nClassSize;
   cin >> nClassSize;
   while (cin.get() != '\n')
   {
       continue;
   }
   student* ptStu = new student[nClassSize];
   int nEntered = fnGetinfo(ptStu, nClassSize);
   for (int i = 0; i < nEntered; i++)
   {
       fnDisplay1(ptStu[i]);
       fnDisplay2(&ptStu[i]);
   }
   fnDisplay3(ptStu, nEntered);
   delete[] ptStu;
   cout << "Done.\n";

   return 0;

}

int fnGetinfo(student sta[], int n)
{
   int i;
   for (i = 0; i < n; i++)
   {
       cout << "Please enter your name: ";
       cin.get(sta[i].fullname, c_nSLEN).get();   //cin.get遇到空行会设置失效位
       if (cin.fail())
       {
           cin.clear();
           while (cin.get() != '\n')
               continue;
           break;
       }
       cout << "Please enter your hobby: ";
       cin.get(sta[i].hobby, c_nSLEN).get();
       if (cin.fail())
       {
           cin.clear();
           while (cin.get() != '\n')
               continue;
           break;
       }
       cout << "Please enter your ooplevel: ";
       cin >> sta[i].nOoplevel;
       while (cin.get() != '\n')
           continue;
   }
   return i;
}

void fnDisplay1(student st)
{
   cout << "Your name: " << st.fullname << endl
       << "Your hobby: " << st.hobby << endl
       << "Your ooplevel: " << st.nOoplevel << endl;
}

void fnDisplay2(const student* pst)
{
   cout << "Your name: " << pst->fullname << endl
       << "Your hobby: " << pst->hobby << endl
       << "Your ooplevel: " << pst->nOoplevel << endl;
}

void fnDisplay3(const student* pst, int n)
{
   for (int i = 0; i < n; i++)
   {
       cout << "Your name: " << (pst+i)->fullname << endl
           << "Your hobby: " << (pst+i)->hobby << endl
           << "Your ooplevel: " << (pst+i)->nOoplevel << endl;
   }
}

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