Thread: error in a for loop

I am having an error in my code below and cant figure out why. It must be some stupid smalle error. After doing a lot of testing, I have conluded that the first time through goes fine. But when it loops through a subsequent times it automatically returns 0, though the if statement is not true. Any idea what is wrong here?

edit: setCardinality returns the size of the array.

Code:

int isSubset(int a[], int b[]){
	
	int isMember(int x, int a[]);
	int setCardinality(int a[]);
	int i;

        /*problem somewhere in here, returns 0 on loops after first*/
	for(i=0;i<=setCardinality(b);i++){
		
	if((isMember(a[i],b))==0){
			return 0;
		}
	}

	return 1;
}