Thread: error "debug assertion failed"

@ Elysia,


Okay i tried what you said. But the thing is that as you pointed out to go to the stack and then work my way back to the code to figure out where the exact line is. I am unable to see any stack tab throughout the Visual C menus and windows. It gave me three options to either abort, retry or ignore. I tried all three but still no where the stack tab shows.

Any suggestions on how do i go to the stack tab. Anyhow i am attaching a screenshot of the error message that i got when i tried the program.

Right there, the error is telling you the line of code with the error is 41, and shows the expression that caused the failure.

You have been given everything that you need, right on a silver platter!

But the thing is that the line number 41 in my current code sample is a blank line. It has no C statements in it.

Also i think that the line number it is referring to where the error has occured is in some file

src\fgetc.c

But this is not the file that i created. Any thoughts ?????

If you've made the changes that were given to you as answers on page one, you should not be receiving this error, anymore.

If you haven't made those changes yet, please do so.

If you still have problems, post up the new code, so we can see what you're now talking about.

Yes i made the changes as mentioned. But i was trying to get to the point what Elysia was referring to on how to figure out exact place where error occured.

Anyhow the modified code is as follows:
[insert]

Code:

#include <stdio.h>
#include <stdlib.h>

int main(void){

	FILE *fp;
	int ch;
	int nol= 0, not = 0, nob = 0, noc =0;

	fp = fopen("C:\\Documents and Settings\\ROHAN\\Desktop\\DESKTOP\\filejava.txt", "r");
	if(fp == NULL){
		
		printf("\n Error opening the file");
		return 0;
	}

	while(1){
	
		ch = fgetc(fp);

		if(ch == EOF)
			break;

		noc++;

		if(ch == ' ')
			nob++;

		if(ch == '\n')
			nol++;

		if (ch == '\t')
			not++;
	}

	fclose(fp);
	printf("\n No of char = %d", noc);
	printf("\n No of line = %d", nol);
	printf("\n No of tab = %d", not);
	printf("\n No of space = %d", nob);

	return 0;
}

Its working perfectly fine.

Go to the "View" pull down menu, select "Debug Windows" >> Call Stack (Alt+7), in VS C/C++ 6.0. Your version should be similar. Only available when you're actively debugging, of course.

Remember that in the call stack you might see a lot of stuff that isn't your program. The call stack is basically a list saying, "main called a on line b, c called d on line e....". Your code might have called several other functions in the standard library before the error actually caused a problem, so just look for the last line that points to code YOU wrote.

Just as another attempt at putting the EOF issue into laymen's terms, EOF is not a regular character. If you try to force every value you read be a character, you'll lose some information that can't be represented as chars. That's why you should read 'ints'. If you read ints, any regular character maintains it's original value and can be converted to a char for other purposes; but then you have the added benefit of reading information like EOF.

Yes i can look into the call stack now and figure out the exact line where the error seems to happen............ :-)