| Author |
Message |
rizalafande
Joined: 04 Jan 2006
Posts: 11
|
 08 Aug 2008 12:55 Returning values in C language |
|
|
|
Based on C codings below, how can i return 3 output values to be passed to other functions..
==========
float test1 (float x)
{
float a,b,c;
a = x + x;
b = x * x;
c = (x / x) - x;
return a,b,c; /* when using this style, it will only return the result of c but not together with a and b */
}
===========
|
|
| Back to top |
|
 |
FvM
Joined: 22 Jan 2008
Posts: 2635
Helped: 431
Location: Bochum, Germany
|
| 08 Aug 2008 21:08 Returning values in C language |
|
|
|
As additional parameters, passed by reference
| Code: |
float test1 (float x, *a, *b)
{
*a=x+x;
*b=x+x;
} |
|
|
| Back to top |
|
|
jhbbunch
Joined: 21 Feb 2006
Posts: 220
Helped: 15
|
| 08 Aug 2008 23:50 Returning values in C language |
|
|
|
| You can only pass one value back in C. Either put a, b and c into a structure and pass the structure address or pass values by reference as FvM showed. If you pass references you might as well pass all three references and use the return for sucess/error codes.
|
|
| Back to top |
|
|
mezo
Joined: 16 Jul 2007
Posts: 60
Helped: 2
Location: Egypt
|
| 05 Sep 2008 15:46 Re: Returning values in C language |
|
|
|
well , rizalafande
you can do this using pointers . this code is to return 3 values from a function :
void test(int *, int *, int *); /* Prototype of function called Test */
void main()
{
int a, b, c ;
test(&a ,&b ,&c) ; /* Calling test function. */
}
void test(int *pa, int *pb, int *pc)
{
*pa = x ; /* where x, y, z is the values the function will return */
*pb = y ;
*pc = z ;
}
have a note : when you call the function test you give it an arguments
this arguments is the addresses the main function gave to to test function to put the values it want to return in .
hope this be useful .
Last edited by mezo on 08 Sep 2008 23:58; edited 1 time in total |
|
| Back to top |
|
|
aospinas
Joined: 24 Nov 2003
Posts: 41
Helped: 7
|
| 07 Sep 2008 15:01 Re: Returning values in C language |
|
|
|
Hi... is bad
| Code: |
#include <stdio.h>
void test(int *, int *,int *); /* Prototype of function called Test */
int main()
{
int a, b, c ;
test(&a ,&b ,&c) ; /* Calling test function. */
}
void test(int *pa, int *pb, int *pc)
{
int x=1,y=2,z=3;
*pa = x ; /* where x, y, z is the values the function will return */
*pb = y ;
*pc = z ;
}
|
enjoy
|
|
| Back to top |
|
|
