Type conversion in c++?

Question

In Python you can just do this:

myString = "123"
myInt = int(myString)
print(myInt + 1)

result: 124

In c++ I've heard of cast operators:
string myString = "123";
int myInt = (int) myString;
cout << myInt + 1;

result: 'invalid type cast from string to int'

I've searched Google for the answer and I found these:
const_cast<type>(expr)
dynamic_cast<type>(expr)
static_cast<type>(expr)
...

There's so many of them and I need a clear explanation on when to use them and why. I would also like to know when to use:

(type) expression

and how to cast types onto other types as well, eg: double to int, string to double

thanks in advance

Answer 1

So you in c++ is a little diferent from python.

Yes ,you are in the rigth path you can use casting from conversion. Like :

char c = '1' ;
int some = (int) c;

This can be done because char and int both are integer.

But string is different

In this case you want to use a fucntion called stoi

Here a example of using stoi:

https://code.sololearn.com/cNUFd5y7GT70