alloc.h

[riechan]

Has anyone used CodeBlocks (MingW plugins) here? I can't seem to use the alloc.h library. When I try to compile my code, the compiler can't seem to find the alloc.h...

\Desktop\Proj\LinkedList\main.c|4|error: alloc.h: No such file or directory|
\Desktop\Proj\LinkedList\main.c||In function 'insertData':|
\Desktop\Proj\LinkedList\main.c|84|warning: incompatible implicit declaration of built-in function 'malloc'|
\Desktop\Proj\LinkedList\main.c||In function 'delete':|
\Desktop\Proj\LinkedList\main.c|114|warning: incompatible implicit declaration of built-in function 'free'|
||=== Build finished: 1 errors, 2 warnings ===|

I tried compiling the code using Turbo C (in DOSBox), and at first it was sending out a "Declaration not allowed here error":

void save() {
	int i;
	LIST *p;
	p = L;
	FILE *fp;
	fp = fopen("/mit594.dbf", "w+");
	
	while (p != NULL) {
		fprintf(fp,"%d\n",L->x);
		p=p->next;
	}
	fclose(fp);
}

I tried moving the FILE *fp line to the first line in the code and it worked. Can someone explain to me why this happened?

[2kaud]

In Turbo c, definitions have to come at the beginning of the function before statements. p = L; is a statement not a definition so no further definitions are allowed after this statement. That is why when you moved FILe *fp above p = L it worked.

[riechan]

I see. Thanks for clearing that up 2kaud!

[Paul McKenzie]

In Turbo c, definitions have to come at the beginning of the function before statements. p = L; is a statement not a definition so no further definitions are allowed after this statement. That is why when you moved FILe *fp above p = L it worked.

Actually those are the rules of ANSI 'C'. Declarations must occur before executable statements. You would get the same error if you compiled a .C file in Visual Studio and made the same mistake.

Regards,

Paul McKenzie