Example of Input Error

#include "iostream.h"

int main()
{
  int y;

  cin >> y ;
  if (cin.fail()) cout << "Data entered incorrectly." << endl;
  cout << y << endl;
  
  return 0;
}

Output:
w
Data entered incorrectly.
-536882292



#include "iostream.h" 
 
int main() 
{ 
  int item = 0; 
  char garbage; 
 
  cout << "Enter a number: "; 
  cin >> item; 
 
  while(cin.fail()){ 
    cin.clear(); 
    cin >> garbage; 
    cout << "Invalid Entry! Try Again: "; 
    cin >> item; 
  } 
 
  cout << "The number is: " << item; 
 
  return 0; 
}

Output 1:

Enter a number: 3
The number is: 3


Output 2:

Enter a number: y
Invalid Entry! Try Again: t
Invalid Entry! Try Again: 3
The number is: 3


Output 3:

Enter a number: 3.22
The number is: 3