How is "c in depth" book

but the reviews say its awesome

Can we exit from a recursive function in the middle?

Can we exit from a recursive function in the middle?

How?

But return will just return from current call

I want to return back to initial call

But return will just return from current call

I want to return back to initial call

Can we exit from a recursive function in the middle?

C or C++?

C++

#include <iostream> using namespace std; #define SQUARE(x) x*x int main(){ int x = 36 / SQUARE(6); cout << x; return 0; } can anyone explain this program ? why the output is 36 instead of 1

36 / 6 * 6 == 36

#include <iostream> using namespace std; #define SQUARE(x) x*x int main(){ int x = 36 / SQUARE(6); cout << x; return 0; } can anyone explain this program ? why the output is 36 instead of 1

you shoud look on operator precedence table

how

ok

class Solution { public: //Function to find if the given edge is a bridge in graph. int isBridge(int V, vector<int> adj[], int c, int d) { } }; Should I create dfs function below public: or above it?

if you want that function to be public then below, if not - put it above the public keyword, it would automatically be set to private 🤔

I am not taking about isBridge function. I wanna know that if I will create new function called dfs, where should I create that.

I am not taking about isBridge function. I wanna know that if I will create new function called dfs, where should I create that.

36 / 6 == 6 6 * 6 == 36 You need to do: int x = 36 / (SQUARE(6));

Or rather #define SQUARE(x) ((x)*(x))

#include <iostream> using namespace std; #define SQUARE(x) x*x int main(){ int x = 36 / SQUARE(6); cout << x; return 0; } can anyone explain this program ? why the output is 36 instead of 1

#include <iostream> using namespace std; #define SQUARE(x) x*x int main(){ int x = 36 / SQUARE(6); cout << x; return 0; } can anyone explain this program ? why the output is 36 instead of 1

Tazz explained very well above what is the issue, but I want to add. Since you are writing code in 2021 and you're writing in C++ I will suggest not to use macros unless really necessary. They are error prone, can be very difficult to read and debug. In this example multiple things can go wrong. Imagine you put a function call with side effects inside your SQUARE macro call. E.g. SQUARE(getRandomInt(10)); The result will be not a square of a random int, but multiplication of two random ints. And the reader of the code will have hard time to understand what's going wrong. Imagine another situation, you put a call that executes some non-trivial logic inside: SQUARE(someExtensiveCalculations()). Congrats, it's created a performance degradation where nobody expected it. From the look of the code it won't be seen until someone will look up at the implementation of your macro. If you want something to be calculated at compile time you have constexpr functions, otherwise just use normal functions (they can be optimized pretty well also)

See macros are not actually functions, so what exactly happens is your code is replaced by the compiler to write what you have written... So if your macro is SQUARE(x) x*x Your int x = 36 / SQUARE(6) becomes int x = 36 / 6 * 6 This is why you'll have to add parenthesis Like SQUARE(x) (x*x) So it becomes int x = 36 / (6 * 6)

#include <iostream> using namespace std; #define SQUARE(x) x*x int main(){ int x = 36 / SQUARE(6); cout << x; return 0; } can anyone explain this program ? why the output is 36 instead of 1

i see different people use true/false keywords for bool variables and others use 0/1. afaik there is no technical difference, but which style is preferred in modern c++?

https://pastebin.com/AGDsZM9k The answer is the same even if I remove the & sign in print_container. What is the purpose of using the & symbol?

& means an alias for the Vector it will avoid making copy of vector. It is advised to use const reference (const &) where the actual parameter is not getting updated.

If I don't use the & sign, it uses extra memory, right?

When you are using pass by reference it will be monolithic programming i.e it won't allocate memory for copies , in fact won't create copies at all which is efficient

can you give me any link to better understand this?

i see different people use true/false keywords for bool variables and others use 0/1. afaik there is no technical difference, but which style is preferred in modern c++?

Hello guys i have a question, are we allowed to get help if we have school work?

Can anyone explain me what is bubble sort and selection sort??

i see different people use true/false keywords for bool variables and others use 0/1. afaik there is no technical difference, but which style is preferred in modern c++?

https://www.hackerearth.com/practice/algorithms/sorting/bubble-sort/visualize/

Actually the thing is 0 means false and 1 means true, but what happens is that in other languages that do not have a real boolean like BASIC, they use -1 as true and anything else is false. So it really doesn't matter much but it is a good practice to use true/false as it would help you to shift to other languages much easily and at the same time your program becomes easier to read.

Can anyone explain me what is bubble sort and selection sort??

Is the capacity in the vector only 2 powers?

"Unable to find numeric operator 'operator"" Y' "

are you trying to create your "user-defined literals"?

Prblm solved bro

what it was?

Hey guys how can I reverse an array of strings so that if I input an array with elements such as book and pen the output will be koob and nep

Hi I'm new here, Can any one suggest how can i learn c++ from basic , from where to start, nd what are all the sources I will need?