File Handling in C++

[Parul Bagadia]

This is my first program of file handling...
Here we are supposed to simulate sql language......
This is ofcourse not the complete program; m done only with insertion and select* thing; insert thing is workin properly but in case of select*; nothing gets displayed; but when i checked it in debugger; it was ok. I mean the object of class student has the information but it doesnt get displayed...
May be the information m writtin in file is not actually not gettin written in file. I dont know the actual problem; that's what i want to know.
Now m gettin another error when m done with running it.
The errror comes as:
16 bit MS-DOS subsystem
Turbo C++ IDE
The NTVDM CPU has encountered an illegal instruction CS:8baa IP:2e32 OP:c6 5f 5e 5d c3 choose close to terminate the application.
Tell me sth about this in details.
The compiler m using is of Turbo C++ IDE.

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[Parul Bagadia]

Hi,
When i wrote the same code in Microsoft Visual C++ 6.0. i dont get SQL> as written in the code.. Its always coming after i input the line.. And moreover its comin randomly..
Sometimes its comin 4 times in a row.
Can somebody tell me why is this happening.

[Parul Bagadia]

In the same code when i wrote
while(enter[i]!=' ')loop
it worked. and when i wrote while(enter[i]!=' ' || enter[i]!='\n')it never used to come out of the loop.... i checked it even by debugger...
I want to know its reason as well.

[Savage]

In the same code when i wrote
while(enter[i]!=' ')loop
it worked. and when i wrote while(enter[i]!=' ' || enter[i]!='\n')it never used to come out of the loop.... i checked it even by debugger...
I want to know its reason as well.

The reason is that you have used OR instead of AND,so if any of those two expressions succeed it will loop again.Obviously enter[i] can't be ' ' and '\n' in same which is required to exit from the while loop when OR logic is used.

[Parul Bagadia]

The reason is that you have used OR instead of AND,so if any of those two expressions succeed it will loop again.Obviously enter[i] can't be ' ' and '\n' in same which is required to exit from the while loop when OR logic is used.

Yaeh, actually i got it when i again debugged it but still its not working..
I guess now there can be some problem in gettin inserted in file..
I really dont know why its comin out of while loop of selectall function.,

[Parul Bagadia]

Hey people, am waitin to know wats wrong with my code...

[Laharl]

Can we have a snippet of the code that's having a problem? Not the whole code, but a bit, say, this while loop you mention.