Answer 1

Syntax -
static_cast<'type to convert'>('original variable');

Eg :

int num;
float num2;
cin>>num2;

num = static_cast<int>(num2);

Note that static cast can convert anything to anything, so its on you to decide whether the operation can be considered safe or not...

Check this out for more info:
www.cplusplus.com/doc/tutorial/typecasting