USACO:Section 1.1 Greedy Gift Givers

气死我了，提交半天么成功，原来他们的“_”是指空格，气死俺了。

/*
ID:lwj13961 
TASK:gift1
LANG: C++
*/

#include<iostream>
#include<fstream>
#include<vector>
#include<cstring>
#include<cassert>
using namespace std;

class person 
{
	public:
		string name;
		int out;
		int in; 
};

int NP=0;										//the quantities of groups
vector<person> ps;

int gift()
{
	
	char *ifs_file_name = "gift1.in";			/* input  file name       */
	ifstream	ifs;							/* create ifstream object */
	ifs.open (ifs_file_name);					/* open ifstream          */
	if (!ifs)
   	{
		cerr << "\nERROR : failed to open input  file " << ifs_file_name << endl;
		exit (EXIT_FAILURE);
	}
	ifs>>NP;

	assert(NP>=2||NP<=10);								//N2<=P<=10

	string name;	
	person p;
	for(int i=0;i<NP;i++)
	{
		ifs>>name;
		assert(name.size()<=14);			// name <14 charactors
		p.name = name;
		p.out=0;
		p.in=0;
		ps.push_back(p);
	}

	int totalmoney;
	int personnum;
	vector<person>::iterator ip;
	while(!ifs.eof())
	{
		ifs>>name;
		
		if(name=="") return 1;

		ifs>>totalmoney>>personnum;

		assert(totalmoney>=0||totalmoney<=2000);

		int getmoney;
		if(personnum!=0)
			getmoney=totalmoney/personnum;
		else
			getmoney=0;

		//find the gving person ,update his out 
		if(!ifs.eof())
		for(ip=ps.begin();ip!=ps.end();ip++)
		{
			if(strcmp((*ip).name.c_str(),name.c_str())==0)
			{ 
				(*ip).out += getmoney*personnum;
				//cout<<(*ip).name<<" out money:"<<(*ip).out<<endl;
				break;
			}
		}
		
		//find the get person,update his in
		for(int i=0;i<personnum;i++)
		{
			string getname;
			ifs>>getname;
			for(ip=ps.begin();ip!=ps.end();ip++)
			{
				if(strcmp((*ip).name.c_str(),getname.c_str())==0)
				{
					(*ip).in += getmoney;	
				//	cout<<name<<" give "<<(*ip).name<<" money:"<<getmoney<<" ";
				//	cout<<(*ip).name<<" in money:"<<(*ip).in<<endl;
					break;
				}

			}
		}

	}
	ifs.close ();								/* close ifstream         */


	//output result
		
	char *ofs_file_name = "gift1.out";		/* output file name       */
	ofstream	ofs;							/* create ofstream object */

	ofs.open (ofs_file_name);		/* open ofstream          */
	if (!ofs) {
		cerr << "\nERROR : failed to open output file " << ofs_file_name << endl;
		exit (EXIT_FAILURE);
	}
	
	vector<person>::iterator it;
	for(it=ps.begin();it!=ps.end();it++)
	{
		ofs<<(*it).name<<" "<<(*it).in-(*it).out;
		ofs<<endl;
	}

	ofs.close ();		/* close ofstream         */
}


int main()
{
	gift();
	return 0;
}