Thread: Intersection of 2 Arrays.

Originally Posted by lexy

I need help figuring out whats wrong with my intersection function.
I have to get 2 sets of arrays from the user then find the intersection and print it out.

Code:

#include "stdafx.h"

/*function prototype*/
void getSet1(void);
void getSet2(void);
int findint(int inter[]);
void printInter(int Array[]);


int _tmain(int argc, _TCHAR* argv[])
{
	getSet1();
	getSet2();
	findint();
	printInter(findint);

 
return 0;

}
void getSet1(void)/* Set1 */
{
int i;
int set1[10];

printf("Enter First Set");
for(i=0;i<10;i++)
scanf("%d",&set1);

}


void getSet2(void)/*Set 2*/
{
int i;
int set2[10];

printf("Enter Second Set");
for(i=0;i<10;i++)
scanf("%d",&set2);
}



int findint(int inter[])/*intersection*/
{
int i;
int j;
int k;
getSet1();
getSet2();




for(i=0;i<10;i++)
{
for(j=0;j<10;j++)
{
}
if(getSet1[i]==getSet2[j]);
{
k++;
}
if (getSet1[i] != getSet2[j])
{
k=NULL;
}
}
return k;
}


void printInter(int Array[])/*print out intersection*/
{		
	int k;

		for(k=0;k<10<;k++)
		
		printf("%d",Array[k]);
}

You're assuming that the only problem is in the findInt function, when in actual fact getSet1 and getSet2 are equally as faulty. There are too many wrong here to simply list the problems with this code. You've just written random stuff and expected it to do something remotely sensible.

You need to start with something simpler. First learn how to fill in an array with value supplied by the user, and then print them out afterwards from a separate function.
Hint, pass the array into the function that fills the array in.