simple question

[Tony Jo]

I was wondering why the following code causes an infinite loop when i type
in an alphabetic character?

while (bool == 0)
{
if(scanf("%d", &subjectDuration) == 1)
{
if(subjectDuration > 26 || subjectDuration < 0)
{
printf("The number of weeks is invalid,");
printf("please try again.\n");
}
else
bool = 1;
}
else
{
printf("You have entered an invalid character,");
printf("please try again.\n");
}
}

 

[Russell Hanneken]

I was wondering why the following code causes an infinite loop when i type
in an alphabetic character?

while (bool == 0)
{
if(scanf("%d", &subjectDuration) == 1)
{ [ . . . ]
}
else
{
printf("You have entered an invalid character,");
printf("please try again.\n");
}
}

This is addressed in the FAQ:

http://www.eskimo.com/~scs/C-faq/q12.19.html

See also

http://www.comeaucomputing.com/techtalk/#flushinput

Regards,

Russell Hanneken
(e-mail address removed)

 

[herrcho]

I was wondering why the following code causes an infinite loop when
i type in an alphabetic character?

while (bool == 0)
{
if(scanf("%d", &subjectDuration) == 1)
{ [ . . . ]
}
else
{
printf("You have entered an invalid character,");
printf("please try again.\n");
}
}

This is addressed in the FAQ:

http://www.eskimo.com/~scs/C-faq/q12.19.html

See also

http://www.comeaucomputing.com/techtalk/#flushinput

Regards,

Russell Hanneken
(e-mail address removed)

http://www.eskimo.com/~scs/C-faq/q12.19.html

i can't connect the above.. nor www.eskimo.com

is the url valid ?

 

[Tony Jo]

I was wondering why the following code causes an infinite loop when i type
in an alphabetic character?

while (bool == 0)
{
if(scanf("%d", &subjectDuration) == 1)
{ [ . . . ]
}
else
{
printf("You have entered an invalid character,");
printf("please try again.\n");
}
}

This is addressed in the FAQ:

http://www.eskimo.com/~scs/C-faq/q12.19.html

See also

http://www.comeaucomputing.com/techtalk/#flushinput

Regards,

Russell Hanneken
(e-mail address removed)

Thanks. I totally forgot about that. I've been at my assignment for so long
I totally forgot about clearing the buffer

 

[Richard Heathfield]

http://www.eskimo.com/~scs/C-faq/q12.19.html

i can't connect the above.. nor www.eskimo.com

No problems here.

is the url valid ?

Yes, it's fine. Why not re-try?