How do i know where to put brackets { } in c++ program?

Question

i m very confused where should i put those curly brackets😢😢😢

Answer 1

Also in variable initialisation. (c++11)

int a {5};
char b {'b'};
etc

see: http://www.informit.com/articles/article.aspx?p=1852519
and
https://stackoverflow.com/a/18222927

Answer 2

The opening bracket is for the beginning of a function, while the closing one is for the end.

For example:

#include <iostream>
using namespace std;

int main()
{
cout << "Hello world!";
return 0;
}

The main function's content begins and ends with curly brackets.

Hope this helps :)

Answer 3

also it help you to hide any variables to the local namespace.

#include <iostream>

int main()
{
int a = 1;
{
int b = 2;
cout << a << b; // OK. print 12
}

cout << a; // OK. print 1
cout << b; // error. undefined variable
}

This trick useful when some functional placed to destructor.