The const_cast operator is used to explicitly override const and/or volatile in a cast. : cast « Class « C++






  1. C++
  2. Class
  3. cast

The const_cast operator is used to explicitly override const and/or volatile in a cast.

   
#include <iostream>
using namespace std;
   
void sqrval(const int *val){
  int *p;
   
  // cast away const-ness.
  p = const_cast<int *> (val);
   
  *p = *val * *val; // now, modify object through v
}
   
int main(){
  int x = 10;
   
  cout << "x before call: " << x << endl;
  sqrval(&x);
  cout << "x after call: " << x << endl;
   
  return 0;
}








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