C++ type casting with the static_cast operator [4]

[@haarkee9366]

You explain everything so calmly, perfectly, it's def. easier to understand with you explaining it, thank you.

[@ProfessorHankStalica]

Glad it was helpful!

[@j_naimi6031]

reading the book made it look hard for me, you made it clear in less than 3 minutes for me, thank you edit: u got me as a subscriber i love you bro keep doing your thing

[@ProfessorHankStalica]

Awesome, thank you!

[@surojitnath3336]

That's one of simple explanation I have seen, Thanks for the video :)

[@ProfessorHankStalica]

Glad it was helpful!

[@zhalynkabyken3765]

Great stuff!

[@ProfessorHankStalica]

Glad you think so!

[@seven-xl2225]

you solved my life problem , THX bro

[@Madhav-uq1tm]

Thank you sir❤

[@ProfessorHankStalica]

So nice of you

[@oussamabouallati]

Thank you sir

[@_4p_]

Thank you sir.

[@ProfessorHankStalica]

Welcome!

[@TheRawi]

Thanks for this video. I have a question about multiple casting Here is an example: int array[5]{}; array[0] = 1; array[1] = 2; Is it possible to keep the pointer arithmetic here as "int" but assign only a byte? So that "= 1" and "= 2" would be treated as a single byte/char instead of an int.

[@ProfessorHankStalica]

You could store the 1 or 2 in a char variable, or you could use bitwise operators to store 1 in the high byte and 2 in the low byte of an unsigned short, for example.

[@TheRawi]

@@ProfessorHankStalica Thanks for the answer. I tried to assign it to a temporary variable of type char then assign it, the same result; the compiler still treats it as an int and so the other 6 bits are filled with zeros. What worked for me is this: *(char*)(int*)&array[0] = 1; *(char*)(int*)&array[1] = 2; Here the pointer arithmetic is maintained but only a single byte is copied but I'm not sure if this is safe way of doing it.

[@ProfessorHankStalica]

Why not just make an array of chars? char nums[size]; nums[0] = 1; 1 is stored in a single byte then.

[@TheRawi]

@@ProfessorHankStalica Because I'm dealing with different types in the array. It's like a low level memory access like assembly stack where you can store 1 , 2 or 4 bytes.

[@ProfessorHankStalica]

Sounds like you need an array of unions possibly: kzbin.info/www/bejne/o3y7d6tsZZWpiJIsi=g5Fa7HqLf74RXLo8 union Foo { char c; short s; int i; }; Foo stuff[10]; That would allow you to store 1, 2, or 4 bytes in each element of you array.

[@alimohsin3601]

Loved the explanation. Could you kindly make a video on dynamic casting as well? I'm having a hard time understanding why do we need dynamic casting in the first place. Lets say if their is a virtual function hello() in parent class and we wanna call the overridden hello of derived/child class, wouldn't this approach also achieve the result we want from dynamic cast. Parent * Ptr; Parent P_obj; Child C_obj: Child2 C2_obj; Ptr = &P_obj; Ptr = &C2_obj;

[@ProfessorHankStalica]

In your example, yes because you are using inheritance. It's a form of implicit casting. An example of why you need casting: static_cast(5)/4 to avoid integer division or int a[10]; f.write(reinterpret_cast(a), sizeof(a)) for writing to a binary file.

[@visitor_t-w3p]

I planned to do a the exact clever trick, but then u showed it was a mistake to wrap x/y inside static cast.. Im so stupid :P btw, very straight to the point of demonstration. I liked it

[@ProfessorHankStalica]

Not stupid at all, just didn't know. I have been teaching C++, Python, Java for many years and there's still a ton I don't know. It's normal. Majority of programmers only use a fraction of whatever languages they know. 👍 Glad you got some value out of the video. Thanks for the comment.

[@muhammadamin5284]

sir why you use cin.ignore() and cin.get() ??

[@ProfessorHankStalica]

Here you go: kzbin.info/www/bejne/hHqqmZ2ojLGKeNE

[@lickguitars1276]

i just converted float to int for modulating two numbers, pls take a look if its a good practice or not #include int main() { float num1, num2; std::cout > num1; std::cout > num2; std::cout

[@ProfessorHankStalica]

Seems kind of pointless to me to store the input as floats since you convert them to ints anyway. Why not just make them floats in the first place thereby saving memory and the conversion operations?

[@maknify4538]

how do you delete the whole word without deleting a certain character in that word?

[@ProfessorHankStalica]

Question is too broad, so the answer is "it depends".