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Jun 24th, 2009

i need help pleaz >>

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hello every body

i have a problem with a c program .
the question that ( write a c program that reads a real numbers untill error then calculate the sum and the average of all numbers )

i have solve it with a while looping . and i need it with adiffrent looping .

C Syntax (Toggle Plain Text)
#include<stdio.h>
 
void main()
{
 float total,average;
 int s;
 float a;
 
 while((scanf("%f",&a)>0))
 {
  total=total+a;
  s=s+1;
 }
 average =total/s;
 printf("The sum of numbers are %f and the average is %f",total,average);
}
#include<stdio.h>
 
void main()
{
 float total,average;
 int s;
 float a;
 
 while((scanf("%f",&a)>0))
 {
  total=total+a;
  s=s+1;
 }
 average =total/s;
 printf("The sum of numbers are %f and the average is %f",total,average);
}

Last edited by bahr_alhalak; Jun 24th, 2009 at 8:02 pm.

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bahr_alhalak

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Jun 24th, 2009

Re: i need help pleaz >>

I don't get it, what's your problem?

Also, don't use void main, replace it with int main.

Last edited by William Hemsworth; Jun 24th, 2009 at 8:09 pm.

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Jun 24th, 2009

Re: i need help pleaz >>

the problem that i need to use this program in another way
for example : for looping , do-while looping

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Jun 25th, 2009

Re: i need help pleaz >>

Click to Expand / Collapse Quote originally posted by bahr_alhalak ...

the problem that i need to use this program in another way
for example : for looping , do-while looping

So what's the problem? Doesn't your book describe a for loop and a do-while loop?

You need to try it, we aren't supposed to do it for you.

WaltP

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Jun 25th, 2009

Re: i need help pleaz >>

thaaaaaanx WaltP ;

i am still trying

C Syntax (Toggle Plain Text)
#include<stdio.h>
#include<conio.h>
 
int main()
{
 float total,average;
 int s;
 float a;
 clrscr();
do
{
total=total+a;
  s=s+1;
}
 while((scanf("%f",&a)>0));
 average =total/s;
 printf("The sum of numbers are %f and the average is %f",total,average);
}
#include<stdio.h>
#include<conio.h>
 
int main()
{
 float total,average;
 int s;
 float a;
 clrscr();
do
{
total=total+a;
  s=s+1;
}
 while((scanf("%f",&a)>0));
 average =total/s;
 printf("The sum of numbers are %f and the average is %f",total,average);
}

Last edited by bahr_alhalak; Jun 25th, 2009 at 5:06 am.

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Jun 25th, 2009

Re: i need help pleaz >>

Don't use conio ( #include<conio.h> ), it's unportable!
To the OP: Are you encountering any problems with your current code? (as you only posted your new code)

Last edited by tux4life; Jun 25th, 2009 at 6:15 am.

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Jun 25th, 2009

Re: i need help pleaz >>

i need another solution for for looping

Last edited by bahr_alhalak; Jun 25th, 2009 at 6:39 am.

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Jun 25th, 2009

Re: i need help pleaz >>

Click to Expand / Collapse Quote originally posted by bahr_alhalak ...

i need another solution for for looping

Changing it to a for loop is not that difficult, look up how a for loop works, or take a look at this small example:

C Syntax (Toggle Plain Text)
int i; // declare this variable before any statement in your code
for(i = 0; i < 5; i++)
{
  /* The code in this code block will run five times */
}
int i; // declare this variable before any statement in your code
for(i = 0; i < 5; i++)
{
  /* The code in this code block will run five times */
}

And because you're so kind I've also Googled up a tutorial about Control structures (if, while, do-while, for): http://www.cplusplus.com/doc/tutorial/control/

Last edited by tux4life; Jun 25th, 2009 at 7:13 am.

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Jun 25th, 2009

Re: i need help pleaz >>

>for(int i = 0; i < 5; i++)

That code where 'i' is declared within the parenthesis
...
'for' loop initial declaration used outside C99 mode JFYI

Last edited by iamthwee; Jun 25th, 2009 at 7:10 am.

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Jun 25th, 2009

Re: i need help pleaz >>

Click to Expand / Collapse Quote originally posted by iamthwee ...

>for(int i = 0; i < 5; i++)

That code where 'i' is declared with the parenthesis
...
'for' loop initial declaration used outside C99 mode JFYI

I didn't notice I was in the C forum, but according to C99 this was valid, however I edited my post to conform to the C89 standard

C89:

C Syntax (Toggle Plain Text)
int i; // declare this variable before any statement in your code
for(i = 0; i < 5; i++)
{
  /* The code in this code block will run five times */
}
int i; // declare this variable before any statement in your code
for(i = 0; i < 5; i++)
{
  /* The code in this code block will run five times */
}

C99:

C Syntax (Toggle Plain Text)
for(int i = 0; i < 5; i++)
{
  /* The code in this code block will run five times */
}
for(int i = 0; i < 5; i++)
{
  /* The code in this code block will run five times */
}

Last edited by tux4life; Jun 25th, 2009 at 7:16 am.

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