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Re: Arithmetic error

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"Andy Foot" <foot@dev.null.invalid> wrote in message
news:j4toe7$1ls$1@speranza.aioe.org...
> Hello
>
> I have recently started a distance-learning C course.
>
> I am writing a program to input some numbers and calculate they're mean
> (average). However there is a bug: if the numbers are 1,2,3 then the
> calculation is correct (mean=2) however if the numbers are 1,2 then the
> answer is wrong (mean=1, should be 1.5).
>
> What's going on!

Try this version. The main change is moving the (float):

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

int main (void)
{
    char buf[BUFSIZ];
    int a=0,b=0;
    puts("Enter one number per line. Blank line to end:");
    while(strcmp(gets(buf),"")!=0){
        a++; b+=atoi((char*)buf);
    }
    if (a) printf("Mean=%f\n",((float)b/a));
}

BTW you should use a newer textbook. (And where is BUFSIZ declared? Seems to 
compile though..)

-- 
bartc 

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Arithmetic error Andy Foot <foot@dev.null.invalid> - 2011-09-15 20:50 +0000
  Re: Arithmetic error Ian Collins <ian-news@hotmail.com> - 2011-09-16 08:56 +1200
  Re: Arithmetic error Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-09-15 14:07 -0700
  Re: Arithmetic error "BartC" <bc@freeuk.com> - 2011-09-15 22:34 +0100
    Re: Arithmetic error Ike Naar <ike@sverige.freeshell.org> - 2011-09-15 22:07 +0000
    Re: Arithmetic error Ike Naar <ike@sverige.freeshell.org> - 2011-09-15 22:04 +0000
  Re: Arithmetic error Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-09-15 22:52 +0100
    Re: Arithmetic error Fred <fred.l.kleinschmidt@boeing.com> - 2011-09-16 11:37 -0700

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