Filing example

[The Buzzer]

hello guys,

here is another problem on filing. it creates the intended files and it is saving as well. but the problem is the numbers become invisible this time in those files. it is showing . . . (dots) instead of even numbers or odd numbers. Anyone has got any idea why it is showing like that? here is the log

#include<stdio.h>
main()
{
FILE *f1,*f2,*f3;
int number,i;
printf("contents of DATA file \n\n");
f1=fopen("DATA","w");/*create data file*/
for (i=1;i<=30;i++)
{
scanf("%d",&number);
if (number==-1)break;
putw(number,f1);
}
fclose(f1);
f1=fopen("DATA","r");
f2=fopen("ODD","w");
f3=fopen("EVEN","w");

while ((number=getw(f1))!=EOF)/*Read from DATA file*/
{
if(number%2==0)
putw(number,f3);/*"write a EVEN file"*/
else                       
putw(number,f2);/*"write a ODD file"*/
}
fclose(f1);
fclose(f2);
fclose(f3);
f2=fopen("ODD","r");
f3=fopen("EVEN","r");
printf("\n\n contents of ODD file\n\n");
while((number=getw(f2))!=EOF)
printf("%d",number);
printf("\n\n contents of EVEN file\n\n");
while((number=getw(f3))!=EOF)
printf("%4d",number);
fclose(f2);
fclose(f3);
getch();
}

[William Hemsworth]

I think its about time you learn to use code tags, even though you have already been told to use them before and ignored what was said. Try again with code tags..

[vmanes]

Hmm, I thought I was in the C++ forum.

Oh, I am!

This C code works for me, I see the numbers. How are you viewing the resulting data files?

Keep in mind that putw() is writing an int to the file, not the ASCII values representing the numbers.

[The Buzzer]

Hmm, I thought I was in the C++ forum.

Oh, I am!

This C code works for me, I see the numbers. How are you viewing the resulting data files?

its like a dot dot (......) in the notepad, don't know why

[vmanes]

Read my last line again. Then examine your output file(s) in a hex editor.

(No programmer should leave home without one.)

[The Buzzer]

Read my last line again. Then examine your output file(s) in a hex editor.

(No programmer should leave home without one.)

x

thanx for replying

what do u want me to do?

delete those putw() codes?
if i delete those then it will not show the results
so any other idea?

how can i examine output files in hex editor, can u explain. pls note i am using dev C++ and os is vista.

Regards

[Shaky Rox]

I think i got that what i was searching for..!!
Can this code give me the values that user is entering ..??
So that i can trace what he has typed..?

[raptr_dflo]

Shaky Rox, you've posted into a three-year-old thread, in general if you have a question about an inactive thread, copy any relevant info into a new thread.

Meanwhile, you can insert your own "printf()" statements if you wish to echo back what the user typed.