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  1. #include <iostream>
  2.  
  3. int main()
  4. {
  5.     int x = 20;
  6.     std::cout << " x = " << x << '\n';
  7.  
  8.     int* p = &x;
  9.     *p = 10;
  10.     std::cout << " x = " << x << '\n';
  11.     std::cout << "*p = " << *p << '\n';
  12.  
  13.     p = new int;
  14.     *p = -100;
  15.     std::cout << " x = " << x << '\n';
  16.     std::cout << "*p = " << *p << '\n';
  17.  
  18.     *p = 25;
  19.     std::cout << " x = " << x << '\n';
  20.     std::cout << "*p = " << *p << '\n';
  21.     delete p; //NEVER forget to delete allocated memory
  22.     std::cin.ignore();
  23.     std::cin.get();
  24. }
  25.  
Success #stdin #stdout 0s 3432KB
comments (?)
stdin 
aa
stdout 
 x = 20
 x = 10
*p = 10
 x = 10
*p = -100
 x = 10
*p = 25
https://ideone.com/dPHVI5
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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