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weird problem on visual studio

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Join Date: Nov 2006

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n.aggel

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weird problem on visual studio

Mar 25th, 2007

hi, i have this simple code, that compiles on visual studio 2005.When i try to run the executable through visual studio {pressign ctrl+F5} it does nothing{although the test.txt has size of 1kb}, when i run the exe through the command prompt the program works fine...

Does anyone know why this is happening??

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#include <iostream>
#include <fstream>
 
using namespace std; 
 
int main () 
{
 long start,end;
 ifstream myfile ("test.txt", ios::in|ios::binary);
 start = myfile.tellg();
 myfile.seekg (0, ios::end);
 end = myfile.tellg();
 myfile.close();
 cout << "size of " << "test.txt";
 cout << " is " << (end-start) << " bytes.\n";
 return 0;
}
#include <iostream>
#include <fstream>

using namespace std; 

int main () 
{
 long start,end;
 ifstream myfile ("test.txt", ios::in|ios::binary);
 start = myfile.tellg();
 myfile.seekg (0, ios::end);
 end = myfile.tellg();
 myfile.close();
 cout << "size of " << "test.txt";
 cout << " is " << (end-start) << " bytes.\n";
 return 0;
}

thanks for your time,
NA

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Join Date: Aug 2005

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Ancient Dragon Ancient Dragon is offline

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Re: weird problem on visual studio

Mar 25th, 2007

VC closes the console window when the program ends. If you want to see the program's output you have to add something before the return to make the program wait for you to press a key before continuing. calling cin.ignore() just before the return statement will accomplish that.

Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.

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Join Date: May 2006

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WaltP

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Posting Sensei

Re: weird problem on visual studio

Mar 25th, 2007

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Originally Posted by n.aggel

hi, i have this simple code, that compiles on visual studio 2005.When i try to run the executable through visual studio {pressign ctrl+F5} it does nothing{although the test.txt has size of 1kb}, when i run the exe through the command prompt the program works fine...

Does anyone know why this is happening??

The program opens a window, runs very quickly, finishes, then closes the window. Add cin.getline() just before the return

The 3 Laws of the Procrastination Society:
1) Never do today that which can be put off until tomorrow
2) Tomorrow never comes

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Join Date: Nov 2006

Posts: 202

Reputation: n.aggel is an unknown quantity at this point

Solved Threads: 11

n.aggel

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Posting Whiz in Training

Re: weird problem on visual studio

Mar 25th, 2007

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Originally Posted by WaltP

The program opens a window, runs very quickly, finishes, then closes the window. Add cin.getline() just before the return

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Originally Posted by Ancient Dragon

VC closes the console window when the program ends. If you want to see the program's output you have to add something before the return to make the program wait for you to press a key before continuing. calling cin.ignore() just before the return statement will accomplish that.

i don't want to read any input...the console window doesn't close....Just the output that appears is wrong...

The program that i posted simply reports the size of file..it doesn't need any interaction from the console....

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Join Date: Aug 2005

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Ancient Dragon Ancient Dragon is offline

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Still Learning

Re: weird problem on visual studio

Mar 25th, 2007

>>it doesn't need any interaction from the console

Yes it does if you want to keep the console window from closing. Try what we suggested and you will see why it is needed.

Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.

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Join Date: May 2006

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WaltP

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Re: weird problem on visual studio

Mar 26th, 2007

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Originally Posted by n.aggel

i don't want to read any input...the console window doesn't close....Just the output that appears is wrong...

The program that i posted simply reports the size of file..it doesn't need any interaction from the console....

Oh? That's not what the other post said. We were answering this problem:

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Originally Posted by n.aggel

When i try to run the executable through visual studio {pressign ctrl+F5} it does nothing{although the test.txt has size of 1kb}, when i run the exe through the command prompt the program works fine...

"it does nothing" is not the same as "output that appears is wrong"

Therefore, start over and describe the problem in detail.

The 3 Laws of the Procrastination Society:
1) Never do today that which can be put off until tomorrow
2) Tomorrow never comes

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