Assertion Failure???
 

I'm trying to read from a text file.I think that everything is correct!It gives me this error message:

Debug Assertion Failed!

Program: D:\Test\sign.exe
File: fscanf.c

Expression: stream != NULL

For information on how your program can cause assertion failure, see the Visual C++ documentation on asserts.
CAN SOMEONE HELP?

#include <conio.h>



int Artm(char *filename);

int Count(char *filename);



int main()

{

        char filename[81]="D:\\Test\\sign.txt";

        Artm(filename);

        Count(filename);

        return 0;

}



int Artm(char *filename)

{

        FILE *fp;

        float sr,a,i;

        char out[81]="\0";

                FILE *fout;

        



        fp=fopen(filename,"r");

        while(fscanf(fp,"%f",&a)!=-1)

        {

                sr+=a;

                i++;

        }

        sr=sr/i;

        printf("Save to:\1.file\n2.screen");

        scanf("%f",&a);

        switch(int(a))

        {

        case 1: printf("Filename ?\n");

                scanf("%s",out);

                fout=fopen(out,"w");

                fprintf(fout,"%f",sr);

                fclose(fout);

                break;

        case 2: printf("%f",sr);

                break;

        default: printf("1 or 2!");

        }

        fclose(fp);

return 0;

}



int Count(char *filename)

{

        FILE *fp;

        float a,i;        



        fp=fopen(filename,"r");

        while(fscanf(fp,"%f",&a)!=-1)

                if(a==6)

                i++;

        printf("Count:%d",i);

        fclose(fp);

return 0;

}

Re: Assertion Failure???
 

I strongly adivse you use code tags [code=c][/code] Also this looks like C code to me...

So perhaps you should post in the C forum.

Chris

Re: Assertion Failure???
 

>Expression: stream != NULL
Yet more proof (as if we needed any) that checking for success is a good thing. perror is your friend, my friend:

fp = fopen ( filename, "r" );



if ( fp == NULL ) {

  perror ( "Error opening file" );

  exit ( EXIT_FAILURE );

}

Re: Assertion Failure???
 

thank you.Now the program is running but it doesn't work correct.Can you give me some advises how to do it.There is a file with numbers(one number per row) the program has to printf the average value of this numbers and how many times there is "6" between them.Thank you!
It must have 2 options.To write the information in file, or to printf on the screen!

Re: Assertion Failure???
 

So what isn't working now?

The counting?
The average?
The output stream choice?

Here's a cookie
> float a,i;
What's i initialised to?

Then read the manual page on how to use printf, and what type %d is for.

Re: Assertion Failure???
 

the average and the function that count for number 6.I know when we use %d %f or etc.I just can`t find where i`m wrong.It has 0 errors and 0 warnings but it doesn`t work properly.

Re: Assertion Failure???
 

Right-click on the left margin at the first line in main(), and insert break point.

Then do run->debug program.

Then hover over the { } icons which appear to figure out which is "step into", "step over", "step out" etc.

Use these to step through your code one line at a time.
At every step, examine your variables to see if they contain what you expect.

When actuality != expectation, that's a BUG.