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func return 2 values

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Join Date: Nov 2008

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minas1

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Re: func return 2 values

#21

Jan 10th, 2009

The function is correct, but you don't call it correctly.
Create 3 variables in main x, y, z, give them values and pass their address to the function.

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Join Date: Jan 2009

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titosd

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Re: func return 2 values

#22

Jan 10th, 2009

like this ??

if yes, but we use the structer, and we should just use in the function the pointers without anything else ....

this is the code:

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#include <stdio.h>
struct mytype
{
int ok;
char ch;
} mytype;
 
struct mytype fundCalculation(int *a,int *b,int *c)
{
struct mytype tmp;
if(*c==*a+*b)  {tmp.ok=1;tmp.ch='+';}
else if(*c==*a-*b) {tmp.ok=1;tmp.ch='-';}
else if(*c==*a * *b) {tmp.ok=1;tmp.ch='*';}
else if(*c==*a / *b) {tmp.ok=1;tmp.ch='/';}
else {tmp.ok=0;tmp.ch=' ';}
 
return tmp;
 
}
main()
{
 
int x=3;
int y=4;
int z=12;
 
printf("%i %c ",fundCalculation(&x,&y,&z).ok,fundCalculation(&x,&y,&z).ch);
 
getchar();      
}
#include <stdio.h>
struct mytype
{
int ok;
char ch;
} mytype;
 
struct mytype fundCalculation(int *a,int *b,int *c)
{
struct mytype tmp;
if(*c==*a+*b)  {tmp.ok=1;tmp.ch='+';}
else if(*c==*a-*b) {tmp.ok=1;tmp.ch='-';}
else if(*c==*a * *b) {tmp.ok=1;tmp.ch='*';}
else if(*c==*a / *b) {tmp.ok=1;tmp.ch='/';}
else {tmp.ok=0;tmp.ch=' ';}
 
return tmp;
 
}
main()
{
 
int x=3;
int y=4;
int z=12;

printf("%i %c ",fundCalculation(&x,&y,&z).ok,fundCalculation(&x,&y,&z).ch);
 
getchar();      
}

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Join Date: Nov 2008

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minas1

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Re: func return 2 values

#23

Jan 10th, 2009

Yes.

In main, it's a better idea to actually create an oject
int main()
{
struct mytype mt = fundCalculation(....)

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Join Date: Jan 2009

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titosd

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Re: func return 2 values

#24

Jan 10th, 2009

thank you very much minas1

thanks again for helping and tips

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Join Date: Nov 2008

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minas1

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Re: func return 2 values

#25

Jan 10th, 2009

Nothing. Now show us the complete program. also use the typedef for the struct like I told you.

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Join Date: Jan 2009

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titosd

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Re: func return 2 values

#26

Jan 10th, 2009

Ok, I will.
but the program is very long. contain some function, when I finish it I will put it here

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Join Date: Apr 2006

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death_oclock death_oclock is offline

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Re: func return 2 values

#27

Jan 13th, 2009

I think what you want to do is just return the one or zero rather than a struct. The operation can be passed as a pointer to a char (in the parameters). a, b, and c don't need to be pointers.