[求助]fstream 的输出输入目录在哪？？？

刚刚学到，不懂啊
书上没流程。。。。

怎么还是读取不到的，晕。
保存源文件的几个文件夹都放过，
文件是： test.dat 读取时也是test.dat
怎么不行啊 晕。

[此贴子已经被作者于2007-8-22 23:53:55编辑过]

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

int main()
{
cout<<" This program computes the number, maximum,minimum,and\n"
<<"average of an input list of numbers in one file,\n"
<<"and places its results in another file.\n\n";
//--------------------------输入部分----------------------------

cout<<"Entert the name of the input file:";
string inputFileName;
getline(cin,inputFileName);

ifstream inStream;
inStream.open(inputFileName.data());
assert(inStream.is_open());

int count=0;
double reading,
maximum=DBL_MIN,
minimum=DBL_MAX,
sum=0;

for(;;){
inStream>>reading;
if( inStream.eof() )
break;
count++;
sum+=reading;
if (reading<minimum)
minimum=reading;
if(reading>maximum)
maximum=reading;
}
inStream.close();

//-------------------------------------------

cout<<"Enter the name of the output file:";
string outputFileName;
getline(cin,outputFileName);
ofstream outStream;
outStream.open(outputFileName.data());
assert( outStream.is_open() );

outStream<<"\n-->There were"<<count<<"values";

if(count>0)
outStream<<"\n\tranging from"<<minimum
<<" to "<<maximum
<<"\n\tand their average is " <<sum/count
<<endl;

outStream.close();
cout<<"processing complete.\n";
return 0;
}

[此贴子已经被作者于2007-8-24 13:56:33编辑过]

data可以的。getline也可以，只是不要输入除文件名和回车以外的任何其他符号

[此贴子已经被作者于2007-8-24 14:07:20编辑过]

你是整数，当然读不成功，改成11.0这种形式看看

没被读取吧。
assert(inStream.is_open()); //这句显示他打不开这文件啊

我换成c_str()也试过了，打不开文件
用VC 2005也一样就是打不开

[此贴子已经被作者于2007-8-24 15:46:50编辑过]

加了txt后缀都不变格式的

.dat后缀也没变格式

[此贴子已经被作者于2007-8-24 16:07:04编辑过]

哈哈 可以了，还要加这个后缀 晕啊。