3-5.cpp

Accelerated C++ 课后练习题 本人自己完成、可供参考

#include<algorithm>
#include<iomanip>
#include<ios>
#include<iostream>
#include<string>
#include<vector>
using namespace std;
int main()
{
	vector<string> name;
	vector<double> scort;




	while(1)
	{
		cout<<"Please enter your first name: ";
		string s,r;
	
		cin>>s;
		if(s=="exit")
			break;
		cout<<"Hello, "<<s<<"!"<<endl;

		cout<<"Please enter your midterm and final exam grades: ";
		double midterm,final;
		cin>>midterm>>final;

		cout<<"Enter all your homework grades, "
			"followed by end-of-file: ";

		vector<double> homework;
		double x;
		while(cin>>x)
			homework.push_back(x);
		cin.clear();			//清除错误标记
		cin>>r;					//吸收错误输入
		typedef vector<double>::size_type vec_sz;
		vec_sz size=homework.size();
		if(size==0)
		{
			cout<<endl<<"You must enter your name grades. "
				<<"please try again."<<endl;
			return 1;
		}
	
		sort(homework.begin(),homework.end());


		vec_sz mid=size/2;
		double median;
		median=(size%2==0)?(homework[mid]+homework[mid-1])/2:homework[mid];

		name.push_back(s);
		scort.push_back(median);
	}


	for(vector<string>::size_type i=0;i<name.size();++i)
		cout<<name[i]<<"	"<<scort[i]<<endl;
	



	return 0;
}