Use const_cast on a const reference : const_cast « Data Types « C++ Tutorial

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C++ Tutorial » Data Types » const_cast

2.31.3.Use const_cast on a const reference

#include <iostream>

using namespace std;



void sqrval(const int &val)

{

  const_cast<int &> (val) = val * val;

}



int main()

{

  int x = 10;



  cout << "x before call: " << x << endl;

  sqrval(x);

  cout << "x after call: " << x << endl;



  return 0;

}

x before call: 10
x after call: 100

2.31.const_cast
	2.31.1.	const_cast int value
	2.31.2.	const_cast char type
	2.31.3.	Use const_cast on a const reference
	2.31.4.	Use const_cast to cast parameter before passing it into a function
	2.31.5.	Cast parameter with const_cast

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