/c_gcc #include<stdio.h> void foo(char** ch){ **ch = 'b'; } int main(){ char z = 'a'; char* k = &z; foo(&k); printf("%c",z); return 0; }

Result: b

/c_gcc #include<stdio.h> void foo(char** ch){ **ch = 'b'; } int main(){ char z = 'a'; char* k = &z; foo(&k); printf("%c",z); return 0; }

ah yes. Thx

In C the you need to read from right to left char * lol; lol is pointer to char char const * lol; lol is pointer to const char char * const lol; lol is const pointer to char char const * const lol; lol is const pointer ti const char

but this work also with a simple pointer

but this work also with a simple pointer

Yes

Yes

So malloc for my example was needed. I want show how ** can have affect on the pointer

why would you need pointer to pointer

it isn't a good code, sure. I want only underline that

So malloc for my example was needed. I want show how ** can have affect on the pointer

Your code not is very good

Your code not is very good

yes

it isn't a good code, sure. I want only underline that

^ only for underline the difference

why would you need pointer to pointer

if you want a matrix with dimension chose at runtime for example, or if you want change a pointer location as my (bad) code

Well, there are better methods to implement that

#include <iostream> #include <conio.h> using namespace std; bool gameover; const int width = 20; const int height = 20; int x, y, fruitx, fruity, score; int tailx[100], taily[100]; int nTail; enum edirection{ STOP = 0, LEFT, RIGHT, UP, DOWN }; edirection dir; void setup(){ gameover = false; dir = STOP; x = width / 2 - 1; y = height / 2 - 1; fruitx = rand() % width; fruity = rand() % height; score = 0; } void draw(){ system("cls");// system ("clear"); for (int i = 0; i < width + 1; i++) cout « "#"; cout « endl; for (int i = 0; i<height; i++){ for (int j = 0; j<width; j++){ if (j == 0 || j == width - 1) cout « "#"; if (i == y&& j == x) cout « "0"; else if (i == fruity&&j == fruitx) cout « "f"; else{ bool print = false; for (int k = 0; k < nTail; k++){ if (tailx[k] == j && taily[k] == i){ print = true; cout « "o"; } } if (!print) cout « " "; } } cout « endl; } for (int i = 0; i < width + 1; i++) cout « "#"; cout « endl; cout « "score:" « score « endl; cout « "DASTURCHI:ELYOR NOSIROV" « endl; } void input(){ if (_kbhit()){ switch (_getch()){ case'a': dir = LEFT; break; case'd': dir = RIGHT; break; case'w': dir = UP; break; case's': dir = DOWN; break; case'x': gameover = true; break; } } } void Logic(){ int prevx = tailx[0]; int prevy = taily[0]; int prev2x, prev2y; tailx[0] = x; taily[0] = y; for (int i = 1; i < nTail; i++){ prev2x = tailx[i]; prev2y = taily[i]; tailx[i] = prevx; taily[i] = prevy; prevx = prev2x; prevy = prev2y; } switch (dir) { case LEFT: x--; break; case RIGHT: x++; break; case UP: y--; break; case DOWN: y++; break; } if (x >= width - 1) x = 0; else if (x < 0) x = width - 2; if (y >= height) y = 0; else if (y < 0) y = height - 1; for (int i = 0; i < nTail; i++){ if (tailx[i] == x&&taily[i] == y) gameover = true; } if (x == fruitx&&y == fruity){ score += 10; fruitx = rand() % width; fruity = rand() % height; nTail++; } } int main(){ setup(); while (!gameover){ draw(); input(); Logic(); } return 0; }

this is snake game

good or ??

Where is snake?

in picture

guys share your projects

say your opinion

say your opinion

O'yinni qayerdan olsak bo'ladi?

arzimaydi

arzimaydi

Raxmat..

enum edirection{ STOP = 0, LEFT, RIGHT, UP, DOWN }; = 0 redundant.

Beta rejimda?

Yo'qmi?

system("cls");// system ("clear"); Be portable! Use preprocessor to select command depending on platform (it's still better to not use shell commands at all).

system("cls");// system ("clear"); Be portable! Use preprocessor to select command depending on platform (it's still better to not use shell commands at all).

the code use also conio.h

Yeah, I see.

conio.h is not portable

Someone in this group have programed in gcrypt? xd

Can't compile on my linux system(

Can't compile on my linux system(

because conio.h

system("cls");// system ("clear"); Be portable! Use preprocessor to select command depending on platform (it's still better to not use shell commands at all).

with preprocessor directives can choose if use conio.h or ncurses for compatibility with linux and windows

https://stackoverflow.com/questions/7469139/what-is-equivalent-to-getch-getche-in-linux#7469410 But I'm not sure about _kbhit() replacement.

this code i saw in videolesson and has written i want yo hear errors

what belongings possible to create on with c++

where you study

good night everybody

One example i can make to you is: you have a function where you must modify the value of a pointer. You can pass the pointer of pointer. Void foo(int** p) { //Modify p } Int main() { Int* p = //an address Foo(&p); }

Tough to understand

One example i can make to you is: you have a function where you must modify the value of a pointer. You can pass the pointer of pointer. Void foo(int** p) { //Modify p } Int main() { Int* p = //an address Foo(&p); }

Can you pm me

Or to dynamically allocate a matrix Where p** = array of * (that are arrays them self)

Can you explain me like I am 5 , what's dynamic allocation

And how double pointer is helpful in that case

Can you explain me like I am 5 , what's dynamic allocation

https://stackoverflow.com/questions/1403150/how-do-you-dynamically-allocate-a-matrix

In C the you need to read from right to left char * lol; lol is pointer to char char const * lol; lol is pointer to const char char * const lol; lol is const pointer to char char const * const lol; lol is const pointer ti const char

👍

Well, there are better methods to implement that

Which

In C the you need to read from right to left char * lol; lol is pointer to char char const * lol; lol is pointer to const char char * const lol; lol is const pointer to char char const * const lol; lol is const pointer ti const char

What about putting a const after argument list? e.g. int func (int a) const {...}

What does it mean?

Error

In C the you need to read from right to left char * lol; lol is pointer to char char const * lol; lol is pointer to const char char * const lol; lol is const pointer to char char const * const lol; lol is const pointer ti const char

Which projects you are working with

Error

Are you working for any project based on c

https://stackoverflow.com/questions/1403150/how-do-you-dynamically-allocate-a-matrix

Are you working for any project

Which projects you are working with

Nothing important

HELLO group . I come

happy new year soon....

you will best year and you luky yet!!!!!!!

Hey

Guys !

Anyone online here ?

me

So

Do you know how to code in c or c++ ?

Yeah

hello

Hey

What is up ?

Can u recommend any beneficial books to learn C programming language ?

I am kinda confused here

k&r, I suppose

What does it stand for ?

K & r

kernighan and richie "the c programming language"

no guarantees for the spelling

Do u have the e version of this book ?