delete in C++ code example

Example 1: c++ delet from memory

// Delete pointer
int* ptr1 = new int;
delete ptr1;

// Delete array
int* array = new int[10];
delete[] array;

Example 2: free or delete in c++

delete --> If  you used the 'new' operator
free --> If you used 'malloc'

Example 3: c++ erase remove

std::vector<int> v = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
v.erase(std::remove(v.begin(), v.end(), 5), v.end());
// v will be {0 1 2 3 4 6 7 8 9}

Example 4: delete an array c++

// operator delete[] example
// an advanced example :
#include <iostream> 

using namespace std;

struct MyClass {
  MyClass() {cout <<"MyClass constructed\n";}
  ~MyClass() {cout <<"MyClass destroyed\n";}
};

int main () {
  MyClass * pt;

  pt = new MyClass[3];
  delete[] pt;

  return 0;
}
//simple exmaple :
int main () {
  int * pt;

  pt = new int [3];
  delete[] pt;

  return 0;
}