Storing Variables that come from a random number generator

I am trying to write a program to add, subtract, multiply and divde Fractions. This is just the add part.
User inputs number of problems and number of digits in the numerator and denominator.
My Questions is how do you store the results of the random number generator?

Code:

/* Program Title: Fractions Add
Programmer: Charles Krolick
Date: 12/16/2003*/

#include <stdio.h>
#include <math.h>
#include <system.h>
#include <stdlib.h>
#include <time.h>
struct add1 {int num [10];} addnum;
struct add2 {int dem [10];} adddem;

	int main(void)
{
	int a;//digits in numerator
	int b;//digits in demoninator
	int c;//number of problems
	int j;
	int LIMIT;

	//int p;
	
	printf("All answers must be reduced to its simplest form.\n");
	printf("How many Problems would you like? \n");
		scanf("%i",&c);		
	
	
	printf("Maximum digits in the numerator? \n"); 	//limit a to 3 digits max
		scanf("%i",&a);
		
		if (a==2)
		{
			LIMIT=99;
		}
		if (a==3)
		{
			LIMIT=999;
		}


		srand((unsigned)time(NULL));  	//need 1 a for every c
	 	for (j = 0; j < c; j++)
		{
		int i = rand() % LIMIT;
		//printf("The random number is %d\n", i);
		}
		
	printf("Maximum digits in the denominator? \n");  	//limit b to 3 digits
		scanf("%i",&b);
		
		if (b==2)
		{
			LIMIT=99;
		}
		if (b==3)
		{	LIMIT=999;
		}
	
	 	
		srand((unsigned)time(NULL));  	//need 1 b for every c
		for (j = 0; j < c; j++)
		{
		int i = rand() % LIMIT;
		printf("The random number is %d\n", i);
		}
		
		
	
// 				
//   n1  n2  n3  n4......
//  --- --- --- ---
//   d1  d2  d3  d4......	
		
	


return 0;
}

>how do you store the results of the random number generator?
Most people prefer some form of array, but you can use whatever data structure suits you.

OK
I forgot to add that to my question. should I use an array or a struct. Thanks for the advise Prelude.