Newbie "For" loop problem

[Yarbz2]

I'm very new at this and am stuck on a loop problem.
I'm trying to make an averageing loop but the loop won't ask for the next input. This is what I have:

#include <stdio.h>

void main (void)

{
float sum = 0, score, average;
int number;

printf(&quot;Number of Floats to average? &quot;
scanf(&quot;%i&quot;, &number);
printf(&quot;\n&quot;

for (int x = 1; x <= number; x++)
{
sum = sum + score;
printf(&quot;Score %i= &quot;, x);
scanf(&quot;%.2f&quot;, &score);
printf(&quot;\n&quot;
}

printf(&quot;\nYour total is %.2f\n&quot;, sum);
average = sum / number;
printf(&quot;\nThe Average of the %i Scores = %.2f\n\n&quot;, number, average);

}

The output will number the lines but places -107374176.00 in as the score no matter what I do.

Help!!!
Thanks
Yarbz2

 

[JOLESEN]

You have 2 problems in your code :

1) scanf doesn't support the %.2f. Just use %f.
2) the line sum = sum + score;
should be located AFTER score is entered - otherwise you will always miss the last input.


/JOlesen

 

[olded]

Hi:

Here's my take on your work:

The two biggest problems:

1) Place the sum after the user enters a value.

2) My compiler doesn't like:
scanf(&quot;%.2f&quot;...

other things:

3) change scanf(&quot;%i&quot; .. to scanf(&quot;%d&quot;...

4) your compiler may let you define x in the for loop, but, unfortunately, mine does not. (SCO Open Server V).

5) Although this syntax:
sum = sum + score;

works, &quot;C&quot; veterans like to see:
sum += score;

the latter is also a few clock ticks more efficient.

Regards,

Ed

#include <stdio.h>

void main (void)
{
float sum = 0, score, average;
int number, x;

printf(&quot;Number of Floats to average? &quot;
scanf(&quot;%d&quot;, &number);
printf(&quot;\n&quot;

for (x = 1; x <= number; x++)
{
printf(&quot;Score %i= &quot;, x);
/* scanf(&quot;%.2f&quot;, &score); */
scanf(&quot;%f&quot;, &score);
/* sum = sum + score; */
sum += score;
printf(&quot;\n&quot;
}

printf(&quot;\nYour total is %.2f\n&quot;, sum);
average = sum / number;
printf(&quot;\nThe Average of the %i Scores = %.2f\n\n&quot;, number, average);
}

 

[Yarbz2]

Thanks guys! It worked

You said your compiler didn't like &quot;%.2f&quot;
what are your setting on your compiler... cause mine didn't catch it. And do you know of a way I can set mine better?

Thanks again,
Yarbz2

 

[olded]

Yarbz:

I think I've mislead you. Sorry! scanf(&quot;%.2f .. compiles, but fails at runtime. As JOlesen says, &quot;scanf doesn't support %.2f&quot;.

My runtime error was the for loop completes without scanf asking for input.

Regards,


Ed