Type Casting

"Type Casting" is method using which a variable of one datatype is converted to another datatype, to do it simple the datatype is specified using parenthesis in front of the value.

Example :

#include <iostream.h> using namespace std; int main() { short x=40; int y; y = (int)x; cout << "Value of y is:: "<< y <<"\nSize is::"<< sizeof(y); return 0; }

Result :
In the above example the short data type value of x is type cast to an integer data type, which occupies "4" bytes.
Type casting can also done using some typecast operators available in C++. following are the typecast operators used in C++.

• static_cast
• const_cast
• dynamic_cast
• reinterpret_cast
• typeid

Example :

#include <iostream.h> using namespace std; int main() { int a = 31; int b = 3; float x = a/b; float y = static_cast<float>(a)/b; cout << "Output without static_cast = " << x << endl; cout << "Output with static_cast = " << y << endl; cout << "Type id of x = " << typeid(x).name() << '\n'; }

Result :
In the above example we have assigned the integer variable "a" to be float using the static_cast operator. So the result is "10.3333".
Type casting can also done using some typecast operators available in C++. following are the typecast operators used in C++.