quicksort

[thescratchy]

Hello,

I am trying to use the qsort function but i get an error :

error : expected expression before 'int' on the line where i call the qsort function

int compare(int *a, int *b);
void schrijfUit (int array[]);

int main (void){

	int array[10] = {1, 5, 23, 43, 3, 3, 543, 2, 542, 53};

	schrijfUit(array);
	
	qsort(array,10,sizeof(int),int compare (int *a, int *b));
	
	schrijfUit(array);
	return 0;

}

void schrijfUit (int array[]){
	
	int i;

	for (i = 0; i < 10; i++)
		printf("%i\t", array[i]);
	printf("\n");	

}


int compare(int *a,int *b) {
 	if (*a==*b)
    		return 0;
  	else{
    		if (*a < *b)
        		return -1;
     		else
      			return 1;
	}
}

I think it is a very stupid mistake but i cant see it.

[tabstop]

You need to put in the name of the function, not the prototype.

[laserlight]

After you have fixed that, you should change this:

int compare(int *a, int *b);

to:

int compare(const void *a, const void *b);

since that is what qsort expects.

[thescratchy]

Thank you guys

it is alive