When I run the executable file

I give the argument

But nothings happend

Please, give me (and the whole group) complete sentences.

What does strcmp return and how do you call it?

I'm writing a program which takes an argument in command line and it compares argument given by command line with a string or world, which is store inside an array

(Strcmp(x1 , x2) == 0), strcmp compare x1 and x2 and return True

I give Pouria like argument

Pouria like x2 and argv[] like x1

So if(strcmp(argv[] , x2) ==0) is true, program should print Pouria

But nothing happen

Any help?!

Read about arrays and program arguments

Any help?!

please provide source

please provide source

What do you mean?! I post my code?!

What do you mean?! I post my code?!

code which can be compiled and run

If u're passing argv to strcmp, u're always comparing ur words with argv[0], which is always exe's own path (cmd it was started with)

Read about arrays and program args

Hi everyone

#include <stdio.h> #include <string.h> #include <stdlib.h> int main( int argc, char *argv[] ){ if( argc == 4) { if(strcmp(argv[1], "Pouria") == 0){ printf("hello Pouria\n"); printf("%s", argv[1]); }else{ printf("False \n"); } } }

if( argc == 4) {

if( argc == 4) { this means you should provide three arguments

if( argc == 4) { this means you should provide three arguments

I give nothings happen

./a.out Pouria 32 43

it works

Yes

I understood

What was wrong

I gave it less than 4 argument

Hi guys

Can anyone help me to build a convex hull polygon from n points (points that lies in the edges of the polygon must be included , collinear points )

Can anyone help me to build a convex hull polygon from n points (points that lies in the edges of the polygon must be included , collinear points )

https://stackoverflow.com/questions/62746553/convexhull-polygon-including-the-points-on-the-edges-of-the-polygon?noredirect=1#comment110960961_62746553

/report

Can anyone plz help me in this program .. no compilation error but program is not working... It doesn't give any result .. #cprogramming

That means i have to sort on the basis of polar angle (counterclock wise ) as it is , but in the case of collinear points when the angle will be same i have to store only the lowest y coordinate point or all points ?

Is there anything to change on the main hull code too for this , or i have to only update the comparator function used in sort function (sorting the points on the basis of counterclockwise polar anglea )

Is there any method to sort points on the basis of angles using cross product ? Or i have to find the degree using tan theta !?

Oooh okay i should try this

In this i have to sort A B and C according to the x axis and y axis for other points !?

For non collinear points i have to find the exact degrees or this comparator function with sort work (gfg code for graham scan ) https://www.geeksforgeeks.org/convex-hull-set-2-graham-scan/

How to deal with the collinear points like B O and D or A M and E !?

Okay thanq so much 🙏 I ll ask again if things don't go according to plan 😅

Okay thnx and sorry 😅

Node<int>* deleteMid(Node<int> *head) { Node *n=head; int c=0; while(n!=NULL){ c=c+1; n=n->next; } int d=c/2; Node *curr=head; count=c; while(curr!=NULL){ count=count-1; curr=curr->next; } temp=curr.next; curr.next=temp; return head;

Compilation Failed In file included from runner.cpp:22:0: solution.h: In function 'Node* deleteMid(Node*)': solution.h:26:10: error: missing template arguments before '*' token Node *n=head; ^ solution.h:26:11: error: 'n' was not declared in this scope Node *n=head; ^ solution.h:33:10: error: missing template arguments before '*' token Node *curr=head; ^ solution.h:33:11: error: 'curr' was not declared in this scope Node *curr=head;

pls anyone help me with that

Node<int>* deleteMid(Node<int> *head) { Node<int> *n=head; int temp; int c=0; while(n!=NULL){ c=c+1; n=n->next; } int d=c/2; Node<int> *curr=head; int count=c; while(curr!=NULL){ count=count-1; curr=curr->next; } temp=curr->next; curr->next=temp; return head;

Compilation Failed In file included from runner.cpp:22:0: solution.h: In function 'Node* deleteMid(Node*)': solution.h:40:16: error: invalid conversion from 'Node*' to 'int' [-fpermissive] temp=curr->next; ^ solution.h:41:15: error: invalid conversion from 'int' to 'Node*' [-fpermissive] curr->next=temp; ^4

@lightness_races_in_orbit now tell me pls where i am getting wrong?

Look at the types of variables in the errors

+1

He/she is not blind just confused

You comment like you are very best in this field Don't you remember you were also like that once

Instead of helping you comment

Tell me were you always this good in programming

@lightness_races_in_orbit @A actually i recently shifted from python to c++ so i am having some problems in concepts like templates and standard tempelate library (it doesn't means that I did not studied them) otherwise my basics are clear.

@lightness_races_in_orbit and btw i was just asking for help if u don't want to help me you can refuse also

Yes thats the point some can study and some can't they have to look for different resources for answers You studied on your own that's good but everyone is not same

@lightness_races_in_orbit You had replied earlier that's why i asked

Oh they tag you because they think you or anybody else can help

But you are full of ego miss

You should put your phone on mute or something

@lightness_races_in_orbit and i am having nothing anything personal grudges from you

A @lightness_races_in_orbit now we should move on as fight will waste our time only

A @lightness_races_in_orbit now we should move on as fight will waste our time only

I am not fighting i am just saying a thing

Oh you should keep it to yourself miss it will help you

Because you worth it

Can anyone send notes or PDF of function and loops

#include <stdio.h> int main (void) { int numbers[10] = { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; int i, j; for ( j = 0; j < 10; ++j ) for ( i = 0; i < j; ++i ) numbers[j] += numbers[i]; for ( j = 0; j < 10; ++j ) printf ("%i ", numbers[j]); printf ("\n"); return 0; } Pls I need someone to explain the above code for me..The outcome is 1,2,4,8,16,32,64,128,256 and 512....I need someone to explain the two for loops and how they were able to come up with the results.

Pls you can DM me the explanation..thanks alots

hey all!, I'm trying to write a small program to unpack a tar file, the tar file isn't compressed with gz or anything its a simple .tar file. I'm using tar_extract_all() from "libtar.h" to extract all files, but it fails showing "tar_extract_all(): invalid argument". However a single file is extracted from the archive and empty directory structure is created. https://hastebin.com/ehupusojig.cpp

hi! I went to receiving data with c++ than excel help me please

Can a function be used inside a function?

In which it was created in

Like can doSomething() be used inside doSomething()

Like can doSomething() be used inside doSomething()

Yes, it called recursion

Oh my duck

I was brainstorming for half an hour for this