How Strings Work in C++ (and how to use them)
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In this video we’re going to talk about how strings work in C++. Strings are groups of characters between double quotes: “this is an example of a string”. We use them to store everything from people’s names to entire paragraphs of text, and we can use them like any other variable. Strings are really just char arrays at the end of the day, and this video takes a deeper look at how they work.
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Comments
Brotcrunsher
AuthorYou've made a mistake at 7:03 "[…] otherwise you can just leave it as a char pointer that is totally fine.", implying that it is okay to change a char in that array.
No it is not! That is undefined behavior and leaving a pointer to a String literal non const it deprecated since C++11. You must not change any value of the C-String-Literal!
Rodrigo Macedo
AuthorHi Cherno. Where do you stand on using char* instead of string class when coding in C++? Would you always favor the usage of string class or can you think of a reason why not to?
demmordor
Authorэх буржуйская кодировка
Lei Xun
AuthorMy takeaways:
1. C style string 5:30, and why he uses char* 9:00, because "anything inside a double quote is a char array" 14:10
2. C++ style string 11:04
3. Passing a string to function 16:13, it is better to pass by reference to avoid copy
Wes Gause
AuthorLove your stuff, I am a student learning C++, and your channel is my go to when I need help
cosmin cosma
Authorwhen passing an object as argument, copy is made on stack, 17:18
שקד יעקובי
Authorreally good thank you
Daniyel Zhumankulov
Authorhi Cherno, I hope you will answer when I wrote char n[ ]={'q', 'e'}; it printed without garbage even I did not implement a null character explicitly. Or is that what you said in the video applies only to the debug mode?
血涩狼
Authorcool
soumyadeep pathak
Authorconst* char name = "Cherno";
is giving me error : C++ a value of type cannot be used to initialize an entity of type.
Can someone explain this to me?
Luke Nukem
AuthorCherno!
I copied your code, and you have no errors.
My Code:
main()
{
. . char* name = "Luke";
}
Resulting Error:
E0144: a value of type "const char *" cannot be used to initialize an entity of type "char *"
BUT then I see in your next video that you have to cast (char*) "";
Why don't you have to cast that in this video???
N!cky
Authorchar* name = "Cherno" gives an error message:
A value of type "const char*" cannot be used to initialize an entity of type "char *".
Why does it work in the video?
MikeOnTheBox
Author17:05 Why on the heap if you not using the word new?
Injae Lee
AuthorThe best C++ series on YouTube.
Yekna
AuthorYou no longer need to use #include <string> in order to print strings at least that's what happens to me while using CodeBlocks
tinashe chaza
AuthorHow is the Qstring arg method used?
Dima Rysev
AuthorCool! Useful
eric c
Authorchar* name = "Cherno"; it's a mistake cause a value of type "const char *" cannot be used to initialize an entity of type" char * why doesn't your IDE underline the text with a red line? WHYYY?
CacheTaFace
AuthorThese videos are so helpful, you are the MAN!
patrick ramos
Authorwhat programming platform you use
Ojus Singhal
AuthorYour eyes freaked me out completely.
Dima Khodan
AuthorYou told that string in function arguments dynamically allocated to heap, but it is not. Function arguments is a auto memory (stack allocation).
Shreyas Patil
AuthorI was able to use 'cout' to print the string to the console without including the string.h header file. But you said it will be an error. How come?
Hubert Wójtowicz
Authorchar* name ="Cherno"; //E0144 a value of type "const char *" cannot be used to initialize an entity of type "char * – VS 2019
Utkarsh Saboo
AuthorHi why does "cout<<name<<endl;" return the name Cherno and not the address of the character 'C'?
Utkarsh Saboo
AuthorHi can anyone explain why we can declare char* example = "cherno" but not int* example = {1,2,3,4,5}
Jon
Authorreason why im just passing on my comp sci tests
Abhay Dwivedi
Author6:08
I wrote same code in my vs2019 but it's giving error stating
"cannot convert from const char[7] to char *"
Bigfoot is Just Really Shy
AuthorI tried your example
char name2[6] = {'c','h','e','r','n','o'}
and my output was fine, no strange ascii characters or anything. Maybe C++ has updated it since this video?
Highwind
Authorconst char * string = "String" is the same as declaring and initializing a const char array?
Isadora Toledo
AuthorIf I want to change a string and pass it by reference, without the const word… for example:
void ModifyString(std::string& string)
{
string+=" – Modified String!";
}
am I copying the string to the function?
Kavin nivak
Authorwhat is the IDE u r using?……it looks good and more user friendly
Monish Kumar Durairaj
AuthorHi cherno,
As far I understand the string size when printing is determined by a zero..
So if i wanted to print this string "cherno007"…
Then it will print only cherno….and 007 won't be as 0 is considered as the null termination…
Vinícius Reis
AuthorOh Man…. This is like Game Of Thrones! a Marathon I can only leave if I fall asleep…! Damn it!
Niklas Pfaff
AuthorAre his videos sped up?
yasoda1
AuthorYan, you are a Godsend!
loveboat
AuthorSince when is char* variable = "Cherno" a fucking array? And if so, why aren't you deferencing it when you use it later?!!??!!??!!?!?!?!?!?!?!?!?!? These are things you really should talk about. Useless video.
Chetan Shah
AuthorWatch at 1.25x thanks me later
Nishith Jupally
Author8:37
name in char* name is a pointer variable
and pointer variable is an integer(address value)
then how cout<<name; is printing a string instead of integer?
pball1000
AuthorGood stuff. VERY helpful. Thank you! Im learning so much
Uday Yadav
Authorwhen you wrote name2 and then print it , it shows some random characters and you explained about them , but when i do this (using vs code , gcc c++11) i dont get anythin like that. why ?
jithin kg
Authornow I know, thanks man
Nisha Rani
AuthorI need ur help can u help me plz???