But the question is why I can’t rewrite this string literal, but can read

depending on your compiler and platform this will still seg fault. It is undefined behavior either way. But yes, as already stated you cannot change a string literal. In the code below`A` and B are not the same, one is an array with size 12 and the other one is just a pointer. char A[] = "hello world"; char *B = "hello world";

Ok, then what difference between these two lines: char* ptr = “aaa”; const char* ptr = “aaa”; From both I can read, to both I can’t write

There's no different, but the compiler will give you error if you change ptr

Ok, then what difference between these two lines: char* ptr = “aaa”; const char* ptr = “aaa”; From both I can read, to both I can’t write

Ok, then what difference between these two lines: char* ptr = “aaa”; const char* ptr = “aaa”; From both I can read, to both I can’t write

The difference is that in the first case, you can point ptr to something else entirely, that's not possible in the second case.

you can re-assign the pointer, you can't reassign this one char * const ptr = "aaa"; const char * a; => declare a as pointer to const char char * const a; => declare a as const pointer to cha

Ok, and then const pointer means that I can’t change the value, by this address, or address itself?

you can re-assign the pointer, you can't reassign this one char * const ptr = "aaa"; const char * a; => declare a as pointer to const char char * const a; => declare a as const pointer to cha

if you have a pointer to const you cannot change the content it is pointing to. If you have a const pointer you cannot change what it is pointing to. If you have a const pointer to const you can't change either. char S[] = "Hello"; { const char * const F = S; // F = "1"; // illegal, const pointer // F[0] = '1'; // illegal, pointer to const } { char * const F = S; // F = "1"; // illegal, const pointer F[0] = '1'; // legal } { const char * F = S; F = "1"; // legal // F[0] = '1'; // illegal, pointer to const }

Look at this https://stackoverflow.com/a/11399790 You cannot write because the memory it points to is immutable. But that doesn't mean you cannot use malloc and point to a different memory address.

Thanks, I now understand, that is really interesting declaration: char * const a;

Forget about strings for a while, the whole pooling thing makes it confusing. int a = 10, b = 20; int* const p1 = &a; // p1 = &b; (error ) *p1 = 42; const int* p2 = &a; p2 = &b; //*p2 = 42; (error) Take a look

string s1{"110"}, s2; // cin>>s1; string::reverse_iterator it; for (it = s1.rbegin(); it != s1.rend(); it++) { int i = 0; s2[i] = char(*it); i++; } why s2 doesn't make the copy of s1

Hi guys question i'm creating a program in c ++ with functions and i would need a function that compares me the mean of vectors and The function must compare the mean of vector A with vector B and print me a message if the difference between A and B is less than a maximum of 2 points Same between A and C Same between C and B

Microcontrollers(eg: Arduino, etc...), OS development(Recently, Fucshia, Serenity, etc... with honorable mentions, Microsoft and MacOS which have many parts in C++), Web Backends(For now, I can think of only Telegram), Game Development(Core of Unity, Unreal etc... and is used in UE for scriting), Data Science(ML, Deep Learning etc...)(Tensor flow and Pytorch uses C++ at its core), Emulation(yuzu, etc...), Audio, Web Browsers(Chromium and Firefox), Certain GUI libraries like Skia, part of Flutter etc..., you name it

#include <iostream> #include <string> using namespace std; int main() { string s1{"110"}, s2; s2.resize(s1.length()); int j = 0; for (auto i = s1.rbegin(); i != s1.rend(); i++) { if (*i) s2[j] = '1'; else s2[j] = '0'; j++; } cout << s2 << endl; } here s2 has to print 011 but it's printing 111...

Hi, guys! I am kinda confused of this piece on C11: #include <stdbool.h> const char* bool_to_str (bool arg){ return (const char*[]){“false”, “true”}[(int)arg]; } Are there some memory leaks while returning string literal or not? Returning string like this: return “I am sus string”; Looks interesting, but it is just a char pointer returning. What happened with memory? Is it forbidden?

There's no leakage

?

#include <stdio.h> int main(){ for(char i = 'A';i <='C';i++){ printf("ASCII Code %c: " , i); printf("%d \n" , i); } return 0; } output: ASCII Code A: 65 ASCII Code B: 66 ASCII Code C: 67 Now I have written this code myself, but instead of entering the characters in the loop myself, I intend to enter the user characters in the loop

What will be in ans1, ans2 after: unsigned int a=5, b=0, c=11; unsigned int ans1=!a||b&&c; unsigned int ans2=!a||b&c; a) 1, 5 b) 7, 0 c) 0, 1 d) 11, 5 e) 1, 0 f) 0, 0

0 0

What?

Can you help me?

You need to learn operators, that's it.

Hello guys could someone please help me w/ flood character enable. I’m trying to program my Tivaware DK-TM4C123G

Learning turbo debugger higher version tdstrip says file has bad symbole table Book says if i update files using touch will solve problem But i cant use it in dosbox I found in internet i should use Copy /b Command but it emptys files May sombody help about this

Write and test the following function that removes items from an array: void removeAll(float a[], int& n, float x); The function removes all occurrences of x among the first n elements of the array a and decreases the value of n by the number removed.

Hi, this software seems to be pretty old, not sure if someone here can help with it. Is there an option to use something more up to date?

Thanks i want to learn assembly and debugging and i dont know about other options About it this is my problem, How to update ( time stamps) to check if it solves problem And learn smthing new about this problem My goal is to know how computers work and try to manipulate it in with exact command to details of hardware If you may introduce other options please I will be thankful

So you're using TASM? I don't know much good alternatives since I haven't written in assembly for a decade, but here's a list of different assemblers for reference https://en.m.wikipedia.org/wiki/Comparison_of_assemblers I think I used MASM, but I don't remember if it was difficult to connect a debugger to it.

Learning turbo debugger higher version tdstrip says file has bad symbole table Book says if i update files using touch will solve problem But i cant use it in dosbox I found in internet i should use Copy /b Command but it emptys files May sombody help about this

You are learning DOS assembly or Windows Assembly ?

Asaembly itself

Then i want to learn both

Are you sure about that ?

Hi..I don't know which compiler will be appropriate for my code blocks,I need help to access link of download... anyone can help me?🙏🙏

Yea

My question is how to update time stamp I want to learn assembly in pc and simple Ics I think learning one will help in others

Which one iwill need now independent from os

Just download the code blocks with mingw if you don't want to deal with it

What's the difference between? map. insert({2,30}); map. insert(make_pair(5,6));

What's the difference between? map. insert({2,30}); map. insert(make_pair(5,6));

I remember that {} is an implicit declaration of pair

what is the type of map?

I remember that {} is an implicit declaration of pair