int a[]; int *p=a; std::cout«a«std::endl;

a is pointer to first element

In simple terms; Array == Storage Pointer == Location/Address of Storage.

int a[]; int *p=a; std::cout«a«std::endl;

if im in 1d array , arr behave as pointer

Hey, I have a question for yous. I have limited experience of programming in general. Just little scripts here and there to solve problems. I am good with basics of c++ and now I want to dive deeper. I believe a good practice would be to start studying some open source app and learn how they coded it to get a sense of it. My problem is, I don't even know how to read some open source app. It's just so much of code (even small projects) for me to get started with. Do you have any tips on how do you READ someone's code to understand how they developed that app. For example, let's say implementation of "ls" command on Linux.

1st Get a good IDE; my opinion (netbeans with C:C++ modules) 2. Install Linux entire source code on your disk 3. Try just compiling “ls” instead of whole world. 4. You will know where you stand.. 🙃

No, not netbeans, who even use this. It's a nightmare even for Java

Read the message as many times as you need to understand it https://t.me/programminginc/366386

you r considering functions

you r considering functions

just tell me the difference like if i point a pointer to array then difference between array and that pointer

You don't know what a pointer to array even is

huh

int array[20]; using pointer_t = int (*)[20]; pointer_t arr_ptr = & array;

if i point a pointer to array then if i use array or pointer no differ (1d array)

Hey, I have a question for yous. I have limited experience of programming in general. Just little scripts here and there to solve problems. I am good with basics of c++ and now I want to dive deeper. I believe a good practice would be to start studying some open source app and learn how they coded it to get a sense of it. My problem is, I don't even know how to read some open source app. It's just so much of code (even small projects) for me to get started with. Do you have any tips on how do you READ someone's code to understand how they developed that app. For example, let's say implementation of "ls" command on Linux.

You pass arrays as pointers because there's no "by value" semantic for arrays in C

Unfortunately there's no definitive guide to reading projects code, since there are too many ways to build app architecture and even in the same field you can find dozens of "common" patterns. And without knowing these patterns it can be really hard to understand what the code is actually doing (sometimes even with debugger). It can be frustrating to read such code and then find out that you've spent lot of time on investigating some helper code that is not particularly interesting to the app. What I can suggest in a case you open an app and can't understand where to even start looking: you can try to find some documentation. Second, you can find communities or discussion groups about this project and ask there about where to start and where to look at some things (like you would do when you get to work on a new project). If the project is small, you can ask the developers themself for advices about where to look to find something that you're interested in. And also you can find unit/auto tests and look at their code, sometimes they can provide a lot of insides of how specific systems work. Also there are many articles on the internet (and even a book I see) on the topic of reading code, I suggest to read some of those to get some insights.

Unfortunately there's no definitive guide to reading projects code, since there are too many ways to build app architecture and even in the same field you can find dozens of "common" patterns. And without knowing these patterns it can be really hard to understand what the code is actually doing (sometimes even with debugger). It can be frustrating to read such code and then find out that you've spent lot of time on investigating some helper code that is not particularly interesting to the app. What I can suggest in a case you open an app and can't understand where to even start looking: you can try to find some documentation. Second, you can find communities or discussion groups about this project and ask there about where to start and where to look at some things (like you would do when you get to work on a new project). If the project is small, you can ask the developers themself for advices about where to look to find something that you're interested in. And also you can find unit/auto tests and look at their code, sometimes they can provide a lot of insides of how specific systems work. Also there are many articles on the internet (and even a book I see) on the topic of reading code, I suggest to read some of those to get some insights.

Thank you. So would you haave any suggestions for open source apps that I can start studying? Assuming that you'd have done it at some point yourself.

Hey, I have a question for yous. I have limited experience of programming in general. Just little scripts here and there to solve problems. I am good with basics of c++ and now I want to dive deeper. I believe a good practice would be to start studying some open source app and learn how they coded it to get a sense of it. My problem is, I don't even know how to read some open source app. It's just so much of code (even small projects) for me to get started with. Do you have any tips on how do you READ someone's code to understand how they developed that app. For example, let's say implementation of "ls" command on Linux.

get an ide where links between multiple files work and start intensely staring at the code. you'll understand eventually.

Thanks. Any suggestions? For now, I just use vim for everything. Also, any suggestions for any program that is relatively smaller to "read"?

> use vim for everything anything is fine as long as you can interact with struct, function, enum, and header names and reach their sources instantly. > smaller to "read" idk about small, but i started with reading parts of systemd because i wanted to know how some annoying things there worked

Lol about systemd. So I guess some ide where you could just click on the structs and function definitions to understand where they lead.

Lol about systemd. So I guess some ide where you could just click on the structs and function definitions to understand where they lead.

oh and for intentionally esoteric code (e.g. obfuscated c contest), put it through clang-format and half your work will be done

Interesting, thanks. I'll find something to stare at

Does any one know how I can customise xfce4 logout menu icons? After updating to version 4.16, they look terrible

Absolutely not a question for this group, but I usually solve this problem by installing KDE :^)

Don't be selfish try to answer me

Don't be selfish try to answer me

1. Read all lines in an array 2. Find and remove lines you need to be deleted 3. Rewrite the file

Read the whole file to some collection. As you iterate over it, remove lines starting with hashtag

#include<stdio.h> #include<stdbool.h> struct node { int data; struct node *next; }; struct node *head; void printlist(struct node *p){ while(p != 0 || p!=NULL){ printf("%d",p->data); printf("hell"); p = p->next; } } int main() { int c; bool yes = true; struct node *add; while(yes) { add = (struct node *)malloc(sizeof(struct node)); scanf("%d",&add->data); head = add; printf("enter n for stopiing\n"); scanf("%c",&c); if( c == 'n'){ printlist(head); } } return 0; }

3 enter n for stopiing 4 enter n for stopiing 5 enter n for stopiing 6 enter n for stopiing n enter n for stopiing 0hell

so, malloc can be done without including stdlib.h ?!!! My whole life is a lie..

how should I find and remove it?

Find the character '#' Start removing the characters one by one until you reach the character ' '(space)

Find the character '#' Start removing the characters one by one until you reach the character ' '(space)

He wants to remove the entire line starting with #

#include<stdio.h> #include<stdbool.h> struct node { int data; struct node *next; }; struct node *head; void printlist(struct node *p){ while(p != 0 || p!=NULL){ printf("%d",p->data); printf("hell"); p = p->next; } } int main() { int c; bool yes = true; struct node *add; while(yes) { add = (struct node *)malloc(sizeof(struct node)); scanf("%d",&add->data); head = add; printf("enter n for stopiing\n"); scanf("%c",&c); if( c == 'n'){ printlist(head); } } return 0; }

the nodes that you trying to create aren't linked

Also, i would recommend you to have separate struct node to traverse the list with ease, and also foe adding new elements to the link list

Also, i would recommend you to have separate struct node to traverse the list with ease, and also foe adding new elements to the link list