What is the meaning of int(expr) in C++?

Question

When looking over some code from a friend's project, I recently saw syntax that looked like this.

#include <iostream>

int main(){
    std::cout<< int(32.5/5)  << std::endl;
}

When you run the above code, you get 6, which is the expected value if the use of int functions like a cast.

However, I have never seen this syntax before and I could not find documentation for it on the web. I also did an experiment and noticed that this syntax is not valid in C.

Can someone explain the meaning of this syntax with documentation references?

Answer 1

This is not a constructor call or a "function". There is no "int function".

This is functional cast notation; it's just a cast.

It's the same as (int)(32.5/5) (in this particular case).

And, no, C does not have it.