help returning double

[Maulkin]

I wrote this function it should return a double but the compiler returns this error:
line 38: incorrect function return type
this is my code line 38 is the second line

double expon(int n, int m, int o, int p)
 {
 	int i;
 	double temp;
 	temp = 1;
 	for (i = 1; i < (m + 1); i++)
 	{
 		temp = temp * n;
 		if (p == 1)
 		{
 			while (temp > (double)o)
 			{
 				temp = temp - o;
 			}
 		}
 	}
 	return temp;
 }

 

[Salem]

Which operating system / compiler?

Which line is line 38?

What was immediately before line 38?

As a test, remove as many lines as you can from lines 1 to 37 such that the problem remains, then post that.


--

http://www.catb.org/~esr/faqs/smart-questions.html

 

[Maulkin]

i'm running winME and Miracle C Compiler (r3.2)
and this is the minimumal code.
This line creates the compiler error

----> double expon(){

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

main()
{
	printf(&quot;\nreturned: %.0f&quot;, expon());

}
 
double expon(){
 	double temp;
 	temp = 1;
 	return temp;
}

 

[DucatiST2]

Try declaring your function first as it looks like your compiler thinks that an INT should be returned.
double expon();

 

[Salem]

> i'm running winME and Miracle C Compiler (r3.2)
Figures - that compiler is a toy. It has very few library functions, and is nowhere near being an ANSI-C compiler.

Do yourself a favour and get Bloodshed DEV-C++ / Borland command line 5.5

http://www.compilers.net/Dir/Free/Compilers/CCpp.htm

Don't worry about the C++ tags, they contain perfectly capable C compilers as well. Just make sure you call your files

prog.c

and not

prog.cpp

http://www.tek-tips.com/faqs.cfm?spid=205&sfid=3885

Oh, and as DucatiST2 pointed out, prototype the function before calling it

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

/* this is a prototype */
double expon();

int main()  /* main returns an int */
{
    printf(&quot;\nreturned: %.0f&quot;, expon());
    return 0;
}
 
double expon(){
     double temp;
     temp = 1;
     return temp;
}

--

http://www.catb.org/~esr/faqs/smart-questions.html

 

[Maulkin]

thanks DucatiST2 and Salem prototyping the function worked fine. Also thanks for the advice on Dev-C++ Salem.