I have a function that reverses strings. I read some string arrays from a file with fgets function. When I wrote a string, it can reverse it very well. But when I used it in buffer that read from file, it adds a new line. How can I prevent it to print newline.

char* reverse_word(char *arr){ int i,c,k,length,temp; length=strlen(arr)-1; k=length; for (i=0; i<length/2 ;i++){ temp =arr[k]; arr[k]= arr[i]; arr[i]= temp; k--; if(k == (length / 2)) break; } return arr; }

1) this way of declaring variables is terrible. Declare variables as you need them and initialize right away. Do not declare all the variables in first line of function — this looks bad and it's error-prone

I have a function that reverses strings. I read some string arrays from a file with fgets function. When I wrote a string, it can reverse it very well. But when I used it in buffer that read from file, it adds a new line. How can I prevent it to print newline.

You can check — if last character is new line, then assign '\0' to it

K

K

Kk

/warn screen photo with no reason

its notes

its notes

So?

Do not send screen photos anymore

ok sorry

im writing notes on C currently as a reference. It shall help me alot. i could also use zeal.

after that i will start writing them for C++ :D

printf is not defined in stdio.h printf is declared in stdio.h (or some other file included by stdio.h)

ah ok

worth noting is that return 0 means everything went well

if you are returning from main because something went wrong you should return something else

alrighty

/start@MissRose_bot

Hii

Nörüyonuz be ya 😁

any body plzz help me

while (scanf("%f", &num) < 1) { scanf("%*[^\n]"); ... }

Would you be so kind to break down every line and explain it to me, please?

Bruh

OwO

Hi, what is wrong with my code? How do I fix it? https://hastebin.com/kehayacumu.cpp Skipping . and .. doesn't work :-/

You can check — if last character is new line, then assign '\0' to it

Thank you

Hi, what is wrong with my code? How do I fix it? https://hastebin.com/kehayacumu.cpp Skipping . and .. doesn't work :-/

#howtoask

What did I do wrong?

I exactly described what is faulty in my code and just asked if anyone has an idea how I do fix this

Hi, what is wrong with my code? How do I fix it? https://hastebin.com/kehayacumu.cpp Skipping . and .. doesn't work :-/

This code is not enough to tell what's the problem

This code is not enough to tell what's the problem

I want to display a list of all files in that directory skipping . and ..

We don't know types of the values you are using

What compiler do you use?

We don't know types of the values you are using

ah, I forgot that, sorry

struct dirent *dp; DIR *dfd; char filename_qfd[264]; And I use gcc

Try using -Wall --pedantic flags It can say some errors

Try using -Wall --pedantic flags It can say some errors

warning: comparison with string literal results in unspecified behavior [-Waddress]

warning: comparison with string literal results in unspecified behavior [-Waddress]

Yes, that's the one

Now fix it

How would I fix it?

just char *filename = dp->d_name?

and then compare with filename?

What C++ standard do you use?

What C++ standard do you use?

+11 I think

You cannot compare C-strings with == Either use strcmp or C++17 with std::string_view The last one is preferred way

strcm aah. But how would I use std::string_view? Oh wait before I ask i sahould use ddg

Would you please clarify why does the infinite loop happen and how adding that line solves the problem? im starting with C

The loop happens because temp equals 0 each time you enter a non numerical character. The condition always true, the loop doesn't stop. The second issue is with scanf, it takes automaticaly the new line character as parameter without asking the user to enter something. The expression while(getchar() != '\n') continue; make sure that scanf doesn't take \n as input and therefor wait for the user to enter something. I hope my explanation was clear enough. Good luck

strcm aah. But how would I use std::string_view? Oh wait before I ask i sahould use ddg

using namespace std::string_literal; ... "String Literal"sv == "Other String"sv

using namespace std::string_literal; ... "String Literal"sv == "Other String"sv

ok, thank you

Can I use "String Literal"std::string_view::sv == "Other String"std::string_view::sv too?

I don't like changing the namespace

Can I use "String Literal"std::string_view::sv == "Other String"std::string_view::sv too?

Idc

Ok I'll try

I would change it locally, in the function

using namespace std::string_literal; ... "String Literal"sv == "Other String"sv

Look closely I changed namespace

And google for how to use std::string_view and what are user defined literals, @tuxifan

Look closely I changed namespace

hmm isn't that critical in case of libs?

I mean in headers

hmm isn't that critical in case of libs?

If you're using namespace not globally it's totally fine

If you're using namespace not globally it's totally fine

Ah, okay

If you're using namespace not globally it's totally fine

Like in function, class

Can I store functions in a map?

Can I store functions in a map?

As key or value?

as value

as value

You can https://t.me/programminginc/268947 Read this discussion

You can https://t.me/programminginc/268947 Read this discussion

Thx

My problem is that I have no ideas about labda xD

Can't I simply do: map[key] = functionname;?

Can't I simply do: map[key] = functionname;?

You can

Use function pointers

Ah, great. thx

Use function pointers

So *functionname?

So *functionname?

No

Or &?

Google how to use function pointers :)

Okay.

Btw, *&variable == variable?

I have seen *&variable somewhere