const_cast operator in C++
How is const_cast operator used in C++?
Explanation
const_cast operator is used to add or remove a "const" modifier from a type.
Result :
The value before const_cast is:: 17.5
The value after const_cast is:: 20
In the above example the const_cast operator is used in a function to assign a constant value as "20.0". So that whenever the function is called the "20.0" is returned.
Example :
| #include <iostream.h> using namespace std; void example(const float &a) { float &b = const_cast b = 20.0; } int main() { float c = 17.5; cout << "The value before const_cast is:: " << c << endl; example(c); cout << "The value after const_cast is::" << c << endl; return 0; } |
Result :
The value before const_cast is:: 17.5
The value after const_cast is:: 20
In the above example the const_cast operator is used in a function to assign a constant value as "20.0". So that whenever the function is called the "20.0" is returned.
