find values in user entered array

Question

i am trying to find any user entered value in a array which the user has previously entered the values of. I made the following for finding which values were entered in array bu

Answer 1

Your problem is that an array of integers has no clear definition between assigned and unassigned. You need a way to "flag" these integers. You could do this with a parity array of booleans, that would be flagged based on std::cin.fail(), or use int* and use NULL to flag. There's a lot of ways to do this.

std::vector a(10);
for(int i=0;i<10;i++){
  int input;
  cout<<"enter value : ";
  cin >> input;
  if(!cin.fail()) {
    a[i] = new int(input);
  }else{
    cin.clear(std::ios_base::failbit);
  }
}

Now you're able to test the vector a for NULL pointers.