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Please help me to run my own header file
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I created my own header file in C by creating the ff. files: myfile.h, myfile.c and main.c.Afterwards, I compiled myfile.c so I already have the object file for it, but the problem is when I compiled and run main.c this error message appeared: "Undefined symbol _sum". Please help me to fix this error.See the complete source code of mine below.
// library header file: myfile.h
#ifndef MY_FILE
#define MY_FILE
int sum(int x, int y);
#endif
// library implementation file: myfile.c
#include "myfile.h"
int sum(int x, int y)
{
return x+y;
}
// Program to be run: main.c
#include<stdio.h>
#include "myfile.h"
main()
{
clrscr();
printf("The sum of 3 and 5 is %i",sum(3,5));
getch();
}
// library header file: myfile.h
#ifndef MY_FILE
#define MY_FILE
int sum(int x, int y);
#endif
// library implementation file: myfile.c
#include "myfile.h"
int sum(int x, int y)
{
return x+y;
}
// Program to be run: main.c
#include<stdio.h>
#include "myfile.h"
main()
{
clrscr();
printf("The sum of 3 and 5 is %i",sum(3,5));
getch();
}
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Join Date: Nov 2008
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Use code tags to post your code.
instead of including myfile.h you must include myfile.c
instead of including myfile.h you must include myfile.c
Last edited by ajay.krish123; Jan 23rd, 2009 at 8:34 am.
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Last edited by iamthwee; Jan 23rd, 2009 at 9:33 am.
*Voted best profile in the world*
Putting code in headers is generally bad form....if you include that same header in more than one file in a compilation unit you get duplicate symbols.
The original layout of the files should have worked, did you include myfile.obj or myfile.o when you compiled main.c?
The original layout of the files should have worked, did you include myfile.obj or myfile.o when you compiled main.c?
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