3-2.cpp

Accelerted cpp 第三章答案 （部分） 一本很好的cpp入门书

#include<vector>
#include<algorithm>
#include<iostream>
using std::cout;	using std::cin;
using std::string;	using std::sort; 	
using std::endl;    using std::vector;

int main()
{
	cout << "Please enter a set of numbers:";
	double x;
	vector<double> numbers;
	
	while (cin >> x) 
	     numbers.push_back(x);

	typedef vector<double>::size_type vec_sz;
	vec_sz size = numbers.size();
	if (size == 0) {
	    cout << "You must enter some numbers." << "Please try again." << endl;
	    return 1;
	}

	sort(numbers.begin(),numbers.end());
	int n = size / 4;
	
	cout << "Print these numbers as four parts:" << endl;	
	for(int index = size - 1;index > 0;index--) {
	    int k = 0,count = 0;	
	    cout << numbers[index];
		k++;
		
		if(k == n)
		   count ++;
		if(k == n && count != 4) {
		   cout << endl;
		   count ++;
		   k = 0;
		}
	}
	return 0;
}