Question

write a c++ program to remove the duplicate occurrence of the value present in an integer array... for example... if the array contains 1,2,3,4,5,1,2,3,4,5... after removing duplicate values... we should get 1,2,3,4,5...

Answer 1

This is a simple algorithm. Not efficient one in computations.

You can also use a quicksort program on the array.  Then eliminate duplicates. That will be a simpler program.

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#include <iostream>
using namespace std;

int main() {
    int  i, j, k, N;   int data[100], n ;

    cout << "array size: " ;  cin >> N;  
    cout << "Input data: " ;   for (i=0; i <N ; i++) cin >> data[i] ;
    n=N;
    for (i=1; i<N ; i++) // check if its duplicate
         for (j=0 ; j<i ; j++)
              if (data[i] == data[j]) {
                  for(k=i; k<N-1; k++) data[k] = data[k+1];
                  n--; N--; i--;
                  break;
             }
     cout << "\n"<< n << " unique elements: ";
     for (i=0; i<n; i++) cout << data[i] << ", " ;
     return 0;
}