How can I check If one of the argv equals some predefined char string?

how to use line in parameter while ((getline(&line, &len_host, fhost)) != -1) { curl_easy_setopt(curl, CURLOPT_URL, line);

How can I check If one of the argv equals some predefined char string?

first copy it to some buffer to be safe. then use strcmp. if 0 they match.

'''int main(int argc, char *argv[]) { // input calculador do tit cout << "Que valor tens?"; int escolha; int tit = 0; int tilp = 0; int tip = 0; do{ cout << "Que valores tens?\n 1.Tit\n 2.Tilp \n 3. Tip \n 4. Calcular valor em falta\n"; cin >> escolha; switch(escolha){ case 1: cin >> tit; break; case 2: cin >> tilp; break; case 3: cin >> tip; break; case 4: tit = tilp + tip; cout << "Tit :" << tit << endl << "Tip:" << tip << endl << "Tilt:" << tilp << endl; case 5: cout << "Programa encerrado" << endl; break; } } while(escolha != 5); }''' Why is this not working I wanna give 2 inputs at any given time and then press 4 to print all the values but it never hits right

It works the way it was programmed to. Enter 1 and then enter a value. Do the same for 2 and 3. Now enter 4. It will print the values of each variable. Now enter 5 and the program will break out of the do while loop and exit.

Hi. Are linkedin courses worth it?

Please check the message above. Those are the only recommendations we are making. If you need info on anything outside of that, you will have to do your own research. And in future, please stick to asking questions only related to C and C++ in this group

Suppose if size of integer is of 4 bytes in our computer then using short in front of integer makes it of 2 bytes but on the other hand using long as modifiers in front of integer allows integer data type to take more memory space. Can anyone please explain how it will take more memory when system itself is size of integer as only 4 bytes ?

Hi guys random question about class constructors. If I have a class and I don't set up any specific constructors, do I still need to declare them? Class::Class()=default; or is it okay to just leave them out all together? what's the best practice?

ints and longs are both 4 bytes on modern platforms, but back with 16-bit processors an int was 2 bytes and you used long if you wanted 4. if you want a bigger (8 byte) integer you can use long long or int64_t

and one more why error is shown in my system when I use %d format specifiers to the sizeof operator but the error will get resolved if I use %ld

hello. how can i asiggn a word in another line? this don't work main () { char a[5]; a="asdd"; cout <<"end"<<a; }

strcpy(a, "asddd") a is array of char

Ohh so many thanks, I forgot that 😱 Btw with string type I can use a="adds"

I have a program that when i enter a string like character (a) i get it in ascii number and i get the length of it so i want to put the ascii number by the length , for example number 3 the length is 4 so it printf(“s”,result) the output will be (3333)

I have a program that when i enter a string like character (a) i get it in ascii number and i get the length of it so i want to put the ascii number by the length , for example number 3 the length is 4 so it printf(“s”,result) the output will be (3333)

Can i send you the question translated

#include <stdio.h> int main() { int a; printf("this is %d\n", a); } Hello, Why this variable 'a' defaults to 0 here？

It does only for debug builds

#include <stdio.h> int main() { int a; printf("this is %d\n", a); } Hello, Why this variable 'a' defaults to 0 here？

Gives you a garbage value

Reading uninitialized variables is undefined behavior

#include <stdio.h> int main() { int a; printf("this is %d\n", a); } Hello, Why this variable 'a' defaults to 0 here？

Bcoz you did not assigned any value and why it showing some garbage value

Hello, guys! Has anyone worked with https://github.com/tesseract-ocr/tesseract. I am wondering how to setup a config to properly recognize text on image. Right now, ocr recognize only one piece of text, but not all. Can't send media file unfortunately

Hello, guys! Has anyone worked with https://github.com/tesseract-ocr/tesseract. I am wondering how to setup a config to properly recognize text on image. Right now, ocr recognize only one piece of text, but not all. Can't send media file unfortunately

Good day. Sorry to bother you but I do not understand why in this program when entering the title of a book consisting of two words is remembered only the first. I will be glad for any help https://onlinegdb.com/qn-mJL0v4

Perhaps I'm mistaken, but when you assign the struct to a variable, shouldnt you use malloc? Like, when I'm practicing with lists and I have a struct typenode, I do: typeNode *variable= malloc(sizeof(typeNode)); Don't know if this will solve, just an idea, because the rest of the code seems right to me

Evening! Need some help with my C++ program: I have to create a two directional list using structures. A part of a task is to create a push_back(int) function which will push an integer to the end of a list. In addition, in the twodirlist structure we store only the adress of the front of the list, so we have to use a self-developed function get_back() which returns us a node of the last element (a structre that contains data of an element, adresses of the previous and the next element). Problem is, while creating the list itself and getting the last node, I struggle storing the adress of the previous node. Could you, please, tell me where I make the mistake? biNode *twoDirList::get_back() { biNode* temp = front; biNode* temp_prev = nullptr; biNode* back = temp; while(temp){ temp = temp->next; if (temp) back = temp; if(back) back->prev = temp_prev; temp_prev = temp; } return back; } biNode *twoDirList::push_back(int x) { if (!front){ front = new biNode(x); } else { get_back()->next = new biNode(x); } return nullptr; }

Evening! Need some help with my C++ program: I have to create a two directional list using structures. A part of a task is to create a push_back(int) function which will push an integer to the end of a list. In addition, in the twodirlist structure we store only the adress of the front of the list, so we have to use a self-developed function get_back() which returns us a node of the last element (a structre that contains data of an element, adresses of the previous and the next element). Problem is, while creating the list itself and getting the last node, I struggle storing the adress of the previous node. Could you, please, tell me where I make the mistake? biNode *twoDirList::get_back() { biNode* temp = front; biNode* temp_prev = nullptr; biNode* back = temp; while(temp){ temp = temp->next; if (temp) back = temp; if(back) back->prev = temp_prev; temp_prev = temp; } return back; } biNode *twoDirList::push_back(int x) { if (!front){ front = new biNode(x); } else { get_back()->next = new biNode(x); } return nullptr; }

Your get_back logic is convoluted and wrong. You can just do this: binode* temp = front; while(temp && (temp = temp->next)); return temp; And typically in a bidirectional list, you store a pointer to both the head and the tail of the list.

Evening! Need some help with my C++ program: I have to create a two directional list using structures. A part of a task is to create a push_back(int) function which will push an integer to the end of a list. In addition, in the twodirlist structure we store only the adress of the front of the list, so we have to use a self-developed function get_back() which returns us a node of the last element (a structre that contains data of an element, adresses of the previous and the next element). Problem is, while creating the list itself and getting the last node, I struggle storing the adress of the previous node. Could you, please, tell me where I make the mistake? biNode *twoDirList::get_back() { biNode* temp = front; biNode* temp_prev = nullptr; biNode* back = temp; while(temp){ temp = temp->next; if (temp) back = temp; if(back) back->prev = temp_prev; temp_prev = temp; } return back; } biNode *twoDirList::push_back(int x) { if (!front){ front = new biNode(x); } else { get_back()->next = new biNode(x); } return nullptr; }

while(num--) I know when a number reaches zero, the condition is false. But what happens if the number is negative? For me it keeps running. -1 are true?

Everything non 0 is true

so what return -1?

-1 is evaluated to true

what different return 1 // return -1?

what different return 1 // return -1?

Your solution won't store the adress of the previous node, as far as I understand, it will just go to the end of the list and return the last node, but I also have to store the adress of the previous nodes in the nodes processed 🤔 P.S. Not storing the back node is a part of a task

Why do you need to do that? You are saying it is a bidirectional list. That means you maintain 2 pointers in each node : one to the previous node and one to the next node. You can iterate through the list in any direction. And the solution I gave for getting the back node doesn't require storing any previous nodes which is how it should be (if you dont store a pointer to the tail)

P.S. I have tried finding this on Google, but everybody seems to be using classes instead of structures...

P.S. I have tried finding this on Google, but everybody seems to be using classes instead of structures...

Hi guys. can anyone help me to get the answer "Exactly! Good job." #include <stdio.h> #include <inttypes.h> #include <stdlib.h> static int64_t the_rolling_stones[] = { 94481, 91226, 95774, 30622, 75165, 72293 }; const static int N = sizeof(the_rolling_stones)/sizeof(*the_rolling_stones); static void fail(){ puts("Nope!"); exit(EXIT_FAILURE); } static void aerosmith(int64_t e, int64_t o, int64_t u){ if ( e - u / 7 + 3 * o / 11 ) fail(); } static void green_day(int n, int64_t v){ if (n<N) { if ((n % 2) == 0) green_day(++n, v); else green_day(n + 1, v + the_rolling_stones[n]); } else if (v != 213806) fail(); } static void anthrax(int b, int64_t x){ int64_t k = x; for(; b<N; ++b) { if (b % 2) continue; k *= the_rolling_stones[b]; } if (k != 849419606) fail(); } int main(){ int64_t y, f, c; printf("Please enter the right three numbers: "); fflush(stdout); if (scanf("%" SCNd64 " %" SCNd64 " %" SCNd64, &y,&f, &c) != 3) fail(); the_rolling_stones[0] = y; the_rolling_stones[5] = f; the_rolling_stones[4] = c; green_day(0, 90385); anthrax(1, 7); aerosmith(y, f, c); puts("Exactly! Good job."); }