如何读取txt文件中的数据

[linkpix]

一个txt文件中有一些数据如下：
savings 123 70000
checking 661 20000
savings 128 2000
savings 131 5000
checking 681 200000
checking 688 10000
x 0
要求读取的时候先按行读入，再判断是savings还是checking 之后分类，分别读出后面的2个数字
例如 第一行 先判断是savings 读出 123和700002个数字，分别存储，并把字符串转换成数字，
之后再读第二行，遇见x 0的时候停止
急求 用文件流处理，代码不要太复杂，谢谢。

[wuyu637]

int main()
{
ifstream infile;
infile.open("data.txt",ios::in);

char buffer[200];
char *cMark = new char[200];
while(infile.getline(buffer,200))
{
if(strstr(buffer,"x 0"))
{

cout << "this is the end of file" << endl;
break;
}
if(strstr(buffer,"savings"))
{

cout << " this is saving " << endl;

strtok(buffer, " ");
cMark = strtok(NULL," ");
int number1 = atoi(cMark);
cout << "the first number is " << number1 << endl;
cMark = strtok(NULL," ");
int number2= atoi(cMark);
cout << " the second number is " << number2 << endl;
//delete []cMark;
}
if(strstr(buffer,"checking"))
{
cout << " this is checking " << endl;
//char* cMark= new char [100];
strtok(buffer, " ");
cMark = strtok(NULL," ");
int number1 = atoi(cMark);
cout << "the first number is " << number1 << endl;
cMark = strtok(NULL," ");
int number2= atoi(cMark);
cout << " the second number is " << number2 << endl;
//delete []cMark;
}


}
delete[]cMark;
}

[sxxiaozi]

while(file.ReadString(str))
{
处理str
}
把txt中的一行存到str中，楼主就可以处理了
处理完会自动取下一行

[wens07]

#include<iostream>
#include<fstream>
#include<string>
#include<vector>

using namespace std;


//用于存储两个数据
struct inf
{
	int n;//第一个数据
	int v;//第二个数据
};

void main()
{

	ifstream cin("a.txt");
	string s;
	vector<inf> save;//用于存储savings的数据
	vector<inf> check;//用于存储checking的数据
 
	while(cin>>s)
	{
		inf f;
		if(s=="x")
			break;
		cin>>f.n>>f.v;

		if(s=="savings")
			save.push_back(f);
		if(s=="checking")
			check.push_back(f);
		

	}
	
	
	
} 

[Jacky_Dai]

[Quote=引用 1 楼 wuyu637 的回复:]
int main()
{
ifstream infile;
infile.open("data.txt",ios::in);

char buffer[200];
char *cMark = new char[200];
while(infile.getline(buffer,200))
{
if(strstr(buffer,"x  0"))
{

cout < < "this is the end of file" < < endl;
break;
}
if(strstr(buffer,"savings"))
{

cout < < " this is saving " < < endl;

strtok(buffer, " ");
cMark = strtok(NULL," ");
int number1 = atoi(cMark…
[/Quote]
呵呵！ 不错！