size of array

**goran00** · 04-02-2008

what would i have to keep as an int since size is going into the function as an int???
or could i just make everyhting a double?

**Elysia** · 04-02-2008

makeAnArray returns a value. You aren't storing it in a variable.
If you want to work with doubles, then allocate doubles.
If you want to work with integers, then allocate integers.
Don't do anything else. Change the function accordingly.

**goran00** · 04-02-2008

i changed everything over to doubles
not when i run the program i get this error box:
Windows has triggered a breakpoint in Assignment 8.1.exe.

This may be due to a corruption of the heap, which indicates a bug in Assignment 8.1.exe or any of the DLLs it has loaded.

This may also be due to the user pressing F12 while Assignment 8.1.exe has focus.

The output window may have more diagnostic information.

Code:

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

double* makeAnArray(double size);
int main (){
	int size=0;

	printf("Please enter the size of the array");
	scanf("&#37;i", &size);

	makeAnArray(size);

	free(makeAnArray);

	getchar();
}
double* makeAnArray(double size){
	int* array;
	array=calloc(size,sizeof(double));
	return array;
}

**Dino** · 04-02-2008

Originally Posted by goran00

i changed everything over to doubles

Code:

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

double* makeAnArray(double size);
int main (){
	int size=0; 

	printf("Please enter the size of the array");
	scanf("%i", &size);

	makeAnArray(size);

	free(makeAnArray);

	getchar();
}
double* makeAnArray(double size){
	int* array;
	array=calloc(size,sizeof(double));
	return array;
}

No you didn't.

**matsp** · 04-02-2008

Code:

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

double* makeAnArray(double size);
int main (){
	int size=0;

	printf("Please enter the size of the array");
	scanf("%i", &size);

	makeAnArray(size);

	free(makeAnArray);

	getchar();
}
double* makeAnArray(double size){
	int* array;
	array=calloc(size,sizeof(double));
	return array;
}

What the red bit does is give the function free() the address of makeAnArray - that is not a piece of memory that has been allocated through malloc/calloc, so it will not "go down well".

--
Mats

**Elysia** · 04-02-2008

Again, you can't free a function!
makeAnArray is a function!
You didn't allocate it with malloc or calloc, so you can't free it!

**goran00** · 04-02-2008

i changed that to free(array)
but the problem i am having with that is
error C2072: 'array' : initialization of a function
here is the code. How can i fix that

Code:

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

double* makeAnArray(double size);
	int main (){
	int array()={0};
	int size=0;

	printf("Please enter the size of the array");
	scanf("&#37;i", &size);

	makeAnArray(size);

	free(array);

	getchar();
}
double* makeAnArray(double size){
	int* array;
	array =calloc(size,sizeof(double));
	return *array;
}

**Dino** · 04-02-2008

OMG. I'm totally invisible today. Why am I wasting my time.

**Elysia** · 04-02-2008

Indeed. You need to go back to basics. You don't seem to understand much about C, at all.
Go back to reading about variables, functions, arguments and return types. Then try again.

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