This is not what I ask for
I am not answering your question.
I am asking a separate question.
AHMED
Anonymous
/get cppbookguide
Anonymous
I am not answering your question.
I am asking a separate question.
sizeof gives the binary data "blocksize", not the length of a string representation.
On 32-bit machines an integer is typically 4 bytes.
Ehsan
Hi everyone,
Can anyone write a c++ program can tell how many even,odd, positive and negative number from the input .
Like ....
I input : -5 0 -3 -4 12
The output : even 3 , odd 2 , pos 1 , neg 3
...> Even : 0 , -4 , 12 ...etc
it’s easy to implement with if statements
odd condition: num%2 == 1
even condition: num%2 == 0
positive condition: num>1
negative condition: num<1
Ehsan
then initilize a counter with the value 0 for each condition
Parra
in cmake, do you know how to tell to add_custom_target to watch for changes only in specific files for triggering the build? like how a add_library does with sources, but with custom files
MᏫᎻᎯᎷᎷᎬᎠ
.
AHMED
Is it important to learn c++ 20 features. They are very difficult.
AHMED
??
Pavel
Is it important to learn c++ 20 features. They are very difficult.
It depends. It is needed mostly of your team uses or plan to use C++20 heavily. It is nice to be prepared for the next years, or to show off with your C++ knowledge (in front of colleagues, on interviews, or in chats like this). In other cases, not sure if it's somewhat important.
Артём
I have a code snippet(written by me) I understand intuitively, but cannot figure out how to describe it with smartass words.
template<class> class myDelegate;
template<class Tret, class...Targs>
class myDelegate <Tret(Targs...)> { /*..CODE..*/ }
So I created a class which can be instantiated by function signature, like
myDelegate<int(float, char)> d;
Please help me to find correct words to explain why do we define the class like this (template written twice, the second time with the <> after name...)?
caesar
🍃⃪᪵᪳ ꯭꯭𝅥ٖٖٖٖٖٖٜٖٖٖٖٖ𝆬𝆺꯭꯭꯭𝅥𝆭👑pRiNcE v/s pRiNcEsS𝆺꯭꯭꯭𝅥𝆭👑᪵᪵᪳᪳𝄄꯭
Hi
Anonymous
Paying for a cpp program help
Hanz
Adams Scott
helllo
Anonymous
hello, what's up?
Anonymous
Some languages, like old-school javascript used floats for all numbers to be most flexible. But normal ints is what computers use best.
Anonymous
Why doesn't anyone want to chat? :(
#include <stdio.h>
int main() {
unsigned long long one = (unsigned long long)1.0e10;
unsigned long long pi = 0;
for(int i = 33; i; i--) {
pi = 2*one + (i * pi / (2*i + 1));
}
printf("%llu\n", pi);
return 0;
}
Anonymous
#include<stdio.h>
#include<stdlib.h>
int i,n;
int largearr(int *);
int main()
{
int k;
int *a;
printf("Enter the size of the arrays\n");
scanf("%d", &n);
a = (int *)malloc(n * sizeof(int));
for (i = 0; i < n; i++)
{
scanf("%d", a + i);
}
k=largearr(a+i);
printf("Largest element = %d",*k);
return 0;
}
int largearr(int *c)
{
for (i = 1; i < n; ++i)
{
if (*c < *(c+i))
*c = *(c+i);
}
return *c;
}
Guys can anybody rectify where i did wrong i want print largest number in an array using pointers and function includes malloc ?
Anonymous
#include<stdio.h>
#include<stdlib.h>
int i,n;
int largearr(int *);
int main()
{
int k;
int *a;
printf("Enter the size of the arrays\n");
scanf("%d", &n);
a = (int *)malloc(n * sizeof(int));
for (i = 0; i < n; i++)
{
scanf("%d", a + i);
}
k=largearr(a+i);
printf("Largest element = %d",*k);
return 0;
}
int largearr(int *c)
{
for (i = 1; i < n; ++i)
{
if (*c < *(c+i))
*c = *(c+i);
}
return *c;
}
Guys can anybody rectify where i did wrong i want print largest number in an array using pointers and function includes malloc ?
Variable k is a regular int, not a pointer. If that even compiled it would probably crash... The prefix-star syntax is used with pointers.
Oh, variable i is used outside of the for loop...
The function largearr(), starts in the middle of array, not the beginning... It almost looks right, but should be written as:
int largest(int *arr, int len);
Anonymous
Variable k is a regular int, not a pointer. If that even compiled it would probably crash... The prefix-star syntax is used with pointers.
Oh, variable i is used outside of the for loop...
The function largearr(), starts in the middle of array, not the beginning... It almost looks right, but should be written as:
int largest(int *arr, int len);
i have modified the code but im getting address of the largest number
Anonymous
#include<stdio.h>
#include<stdlib.h>
int i,n;
int largearr(int *);
int main()
{
int k;
int *a;
printf("Enter the size of the arrays\n");
scanf("%d", &n);
a = (int *)malloc(n * sizeof(int));
for (i = 0; i < n; i++)
{
scanf("%d", a + i);
}
k=largearr(a);
printf("Largest element = %d",k);
return 0;
}
int largearr(int *c)
{
for (i = 1; i < n; ++i)
{
if (c < (c+i))
c = (c+i);
}
return *c;
}
Kirill
can you please use pastebin or something?
Anonymous
pastebin?
Anonymous
i have modified the code but im getting address of the largest number
Oh, function largearr() uses a global variable and already knows the length... I should copy/paste this and see what the compilier warnings say.
Kirill
yes
Anonymous
Kirill
because I still has to wait until I am permitted to post links
Anonymous
#include<stdio.h>
#include<stdlib.h>
int i,n;
int largearr(int *);
int main()
{
int k;
int *a;
printf("Enter the size of the arrays\n");
scanf("%d", &n);
a = (int *)malloc(n * sizeof(int));
for (i = 0; i < n; i++)
{
scanf("%d", a + i);
}
k=largearr(a);
printf("Largest element = %d",k);
return 0;
}
int largearr(int *c)
{
for (i = 1; i < n; ++i)
{
if (c < (c+i))
c = (c+i);
}
return *c;
}
What changed? Oh, the variable c part was correct before it shouldn't have been edited... The program would be easier using array[index] notation, but I know this is pointer practice.
Just write it this way:
int largest(int *a, int len) {
int big = a[0];
for(int i = 0; i < len; i++) {
if(a[i] > big) big = a[i];
}
return big;
}
Anonymous
yes im practicing pointer which includes array and the use of malloc
Anonymous
@dixie_cup
Anonymous
What changed? Oh, the variable c part was correct before it shouldn't have been edited... The program would be easier using array[index] notation, but I know this is pointer practice.
Just write it this way:
int largest(int *a, int len) {
int big = a[0];
for(int i = 0; i < len; i++) {
if(a[i] > big) big = a[i];
}
return big;
}
The use of implied length (using a global variable) isn't a horrible idea actually, but those sort of things should be a field in a struct... And the bounds length is still obvious in code just after asking for length. But implied lengths are okay in general.
Anonymous
Message from @xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx4
Hello EveryBody! I'm trying to get working container for libreofficeonline from collabora repository. It builds fine but when loading document from my wopi server it (loolwsd process) segfaults (https://paste.centos.org/view/6a7bc19a) when trying to open ssl socket. The question is: what's the recommended approach to segfaults debugging? curl from this container to the same wopi server via ssl succeeds.
Anonymous
Though I'm not sure it's ontopic here
Alpha Max
Alpha Max
Ehsan
Message from @xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx4
Hello EveryBody! I'm trying to get working container for libreofficeonline from collabora repository. It builds fine but when loading document from my wopi server it (loolwsd process) segfaults (https://paste.centos.org/view/6a7bc19a) when trying to open ssl socket. The question is: what's the recommended approach to segfaults debugging? curl from this container to the same wopi server via ssl succeeds.
Here it’s probably because you tried to access an illegal memory address(i.e. dereferenced an invalid pointer), this is the first thing you should check
Ehsan
Here it’s probably because you tried to access an illegal memory address(i.e. dereferenced an invalid pointer), this is the first thing you should check
What I mean by “invalid pointers” is uninitialized pointers
T
is it possible to check invalid pointer at compile time?
Ehsan
I recommend you dump the core in gcc and debug it to see where it stopped
Ehsan
You have to explicitely assign the pointer to nullptr and check it later
Ehsan
I recommend you dump the core in gcc and debug it to see where it stopped
https://www.linuxtopia.org/online_books/an_introduction_to_gcc/gccintro_38.html
Generation Z
Hola i got an error in Code::blocks ing me
“ERROR: You need to specify debugger in the debugger's settings.
(For MinGW compilers, it's 'gdb.exe' (without the quotes))
(For MSVC compilers, it's 'cdb.exe' (without the quotes))”
What does it mean and how do i solve the problem, am a beginner in cpp
MAC
#include<stdio.h>
#include<stdlib.h>
int i,n;
int largearr(int *);
int main()
{
int k;
int *a;
printf("Enter the size of the arrays\n");
scanf("%d", &n);
a = (int *)malloc(n * sizeof(int));
for (i = 0; i < n; i++)
{
scanf("%d", a + i);
}
k=largearr(a);
printf("Largest element = %d",k);
return 0;
}
int largearr(int *c)
{
for (i = 1; i < n; ++i)
{
if (c < (c+i))
c = (c+i);
}
return *c;
}
You don't need use *c for pointer , c++ do it automatically for array
labyrinth
anyone have a good reading resource of hazard pointer? preferably with graphical illustration because the original paper is too hard to understand for me, in a language point of view
Ehsan
labyrinth
I wanna be able to understand it. But the wordings in the paper too hard for me to understand. I can’t find a single resource with graphical illustration of the management process.
Ehsan
I wanna be able to understand it. But the wordings in the paper too hard for me to understand. I can’t find a single resource with graphical illustration of the management process.
it’s actually simple and not that complex. When two or more threads point to the same object you don’t allow modification to the data; you just allow reading access.
Ehsan
I think the best way to understand it is to look at codes implementation
labyrinth
I think the best way to understand it is to look at codes implementation
The one in the paper? I ll try, the pseudo code is a bit confusing to me. I might ask you for help lately haha 😆
Osama
can anyone explain c++ structured binding in simple words please?
Ludovic 'Archivist'
I have a code snippet(written by me) I understand intuitively, but cannot figure out how to describe it with smartass words.
template<class> class myDelegate;
template<class Tret, class...Targs>
class myDelegate <Tret(Targs...)> { /*..CODE..*/ }
So I created a class which can be instantiated by function signature, like
myDelegate<int(float, char)> d;
Please help me to find correct words to explain why do we define the class like this (template written twice, the second time with the <> after name...)?
I think a correct wording could be that "you used template argument overloading to split a function signature to make a more practical and usable template signature for myDelegate"
Vlad
can anyone explain c++ structured binding in simple words please?
https://www.youtube.com/watch?v=aBZlbb9sE-g
Thailand import
Question 2
Write a C function named reverse()that reverses the words in a sentence.
Hint: See strtok() in String.h
Enter a sentence: you can cage a swallow can’t you
Reversal of sentence: you can’t swallow a cage can you
Thailand import
hello, why my code the reversal of sentence wont reverse?
Thailand import
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int reverse(char*str){
if(str){
reverse(strtok(NULL,"\t\n"));
printf("%s", str);
}}
int main(){
char string[90] ;
printf("Enter a sentence: ");
gets(string);
printf("Reversal of sentence: ");
reverse(strtok(string,"\t\n"));
}
⚛ Hz
Keyword: words
⚛ Hz
But you're using \t\n to split
Thailand import
which part need to change?
Diego
A float or int which is more advisable to use in your code?
whichever works best for your scenario
Anonymous
/get cbook
Bumpy
hello everyone
Bumpy
anyone know how can i setup clang to my VS code?
Bumpy
im using WSL
Henry
please can anyone recommend a youtube channel that offer C tutorial
Henry
I mean youtube channel not books
Sharif
Hi, I'm C++ beginner
I need help to understand below code:
#include<iostream>
using namespace std;
int main()
{
int x[6] = {19,10,8,17,9,15};
cout << "This numbers are: ";
for (int n:x){
cout << n << " ";
}
return 0;
}
Result will be as like as:
This numbers are: 19 10 8 17 9 15
But my CodeBlocks showing like that:
4354238 4354238 4354238 continue showing without break
Aakash
Hi, I'm C++ beginner
I need help to understand below code:
#include<iostream>
using namespace std;
int main()
{
int x[6] = {19,10,8,17,9,15};
cout << "This numbers are: ";
for (int n:x){
cout << n << " ";
}
return 0;
}
Result will be as like as:
This numbers are: 19 10 8 17 9 15
But my CodeBlocks showing like that:
4354238 4354238 4354238 continue showing without break
Use “WandBox” or “GodBolt”.. hence in future.
🙃
Anonymous
/warn chin pming
Anonymous
/warn @Hornet0101 pming