Read integer from console using cin : int read « Data Types « C++ Tutorial

#include <iostream>  
using namespace std;  
int main()  
  int length; 
  int width;  
  cout << "Enter the length: "; 
  cin >> length; // input the length 
  cout << "Enter the width: "; 
  cin >> width;  // input the width  
  cout << "The area is ";  
  cout << length * width;
  return 0;  
Enter the length: 12
Enter the width: 12
The area is 144" read
2.2.1.Read int and do the calculation
2.2.2.Use relational operators to compare int type variables
2.2.3.Read integer from console using cin
2.2.4.Read int and char array from keyboard