课程设计——c++中读取txt文件

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#include <iostream>
#include <string>
#include <fstream>
using namespace std;

const int Money = 10000;
struct Patrons
{
	string name;
	double money;
};

int main()
{	ifstream inFile;
	inFile.open("demo6_9.txt");
	if(!inFile.is_open())
	{
		cout<<"could not open the file \"demo6_9\"\n";
		cout<<"program terminating!\n";
		exit(EXIT_FAILURE);
	}

	int num;
	inFile>>num;
	cout<<"the number of Patrons is :"<<num<<"."<<endl;
	inFile.get();  .//读取换行符
//	string name;
//	int money;
	Patrons *pt = new Patrons[num];
	if(inFile.is_open())
	{
		int i;
		for(i=0;i<num;i++)
		{
	//		inFile>>name;
	//		inFile>>money;
	//		pt[i].name = name;
	//		pt[i].money = money;
			getline(inFile,pt[i].name);  //读取一行输入
			(inFile>>pt[i].money).get();
		}

		int k=0;
		cout<<"Grand Patrons:"<<endl;
		for(i=0;i<num;i++)
			if(pt[i].money >= Money)
			{
				cout<<pt[i].name<<" "<<pt[i].money<<endl;
				k++;
			}
			if(k==0)
			cout<<"none.\n";

		cout<<"Patrons:"<<endl;
		if(k==num)
			cout<<"none.\n";
		else
		{
			for(i=0;i<num;i++)
				if(pt[i].money < Money)
					cout<<pt[i].name<<" "<<pt[i].money<<endl;
		}
	}

	inFile.close();
	delete [] pt;
	system("pause");
	return 0;

}

这是我以前做的练习，你看看吧，应该有所帮助~
我的TXT格式是
4
Sam Stone
2000
Freida Flass
100500
Tammy Tubbs
5000
Rich Raptor
55000
至于你说的列确定，行不确定，你也可以用类似cin的方法读取~想想你cin怎么用的，ifstream就这么用~

课程设计——c++中读取txt文件

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原文地址：http://www.cnblogs.com/helloaworld/p/5081822.html