union of two arrays

/****************************
*  Umang B Bhatt       *
*   bhatt.umang7@gmail.com  *
*****************************/

/**
 * program for union of two arrays
 */
#include<stdio.h>
#define TRUE 0
#define FALSE 1
void main()
{

 int n1 = 0 , i =0 , n2=0 , j = 0 , flag =FALSE , no1[100] , no2[100];

 int result[200];
 int r1 = 0 ;

 printf("How many numbers you want to scan in first array ? ");
 scanf("%d",&n1);
 if(n1 < 0 || n1 > 100 )
 {

  printf("Invalid number. It must be brtween 1 to 100");
 }
 else
 {
  // logic for scanning the numbers
  for(i = 0 ; i < n1 ;i++)
  {

   printf("Enter element %d: ", i);
   scanf("%d",&no1[i]);
  } 
 }

 printf("How many numbers you want to scan in second array ? ");
 scanf("%d",&n2);
 if(n2 < 0 || n2 > 100)
 {

  printf("Invalid number. It must be brtween 1 to 100");
 }
 else
 {
  // logic for scanning the numbers
  for(i = 0 ; i < n2 ;i++)
  {

   printf("Enter element %d: ", i);
   scanf("%d",&no2[i]);
  }
 }


  
 // now the union of two arrays
 
 // first we will copy first ayyar in result
 printf("\n");
 for(i = 0 ; i < n1 ; i++)
 {

  result[r1++] = no1[i];
 }
 
 // now we will copy the elements one bt one
 // but before that we will check if that element alaready exists in the array
 // if it already exists then we will not copy otherwise we will copy
 for(i = 0  ; i < n2 ; i++)
 {

  flag = FALSE ;
  for(j = 0 ; j< r1 ; j++ )
  {

   if(no2[i] == result[j] )
   {
    flag = TRUE;
   }
  }

  if(flag == FALSE)
  {
   result[r1++] = no2[i];
  }
 }

  

 // now display the array
 printf("\nTHe array (union) is : ");
 for(i = 0 ; i < r1 ; i++ )
 {

  printf(" %d," , result[i] );
 }
 printf("\b \n");
}