hello. can anyone suggest me how i could improve my coding skills in c/cpp? i want to work on projects but i have zero experience. problem solving like hackerrack gets boring

hello. can anyone suggest me how i could improve my coding skills in c/cpp? i want to work on projects but i have zero experience. problem solving like hackerrack gets boring

oo thanks for your input

https://github.com/fffaraz/awesome-cpp Here are some C++ repositories. Pick 1 that you like. But be aware that these repositories are starred heavily and hence there will be multiple committers. Unless the change you offer is very enticing, it is highly likely that your code will be rejected. Dont let that disappoint you.

Hello everyone, could anyone tell me what is the best source to learn Dynamic programming (DP)

https://m.youtube.com/playlist?list=PLcDimPvbmfT8qAxD6JH_kmXiQwTNcoK78

Thank you, is it for beginners?

Dynamic programming doesnt require you to know other techniques like Greedy and Divide and Conquer. It wont hurt if you know them but. You must know how to calculate complexity of algorithms but.

I see, but don't it need a special requirements?

Not really.

That is why I said it is not just a simple direct proportionality relation to any of the complexities that we regularly use like n, nlgn, n^2 and so on. It depends on the distribution of such numbers. And the math is not that complicated. I can show it here but unfortunately this is not the group for such discussions.

I see, but don't it need a special requirements?

hi guys, can someone help me? I created a makefile with the Visual Studio Code editor. The makefile is called "Makefile" and is a MAK file. The problem is that with the make command from the terminal it does not find any makefiles. Yet I am in the folder where it is saved ... What should I do ?

Hello members,help me to develop a game for kids using c++

Hello members,help me to develop a game for kids using c++

can someone suggest me where to practice c programming questions as a beginner ?

hackerrank.com

"The strategy behind the usual arithmetic conversions is to convert operands to the “narrowest” type that will safely accommodate both values. (Roughly speaking, one type is narrower than another if it requires fewer bytes to store)" "Among the most common promotions are the integral promotions, which convert a character or short integer to type int" These two lines are from a book I'm reading. How can those two go together, given that char or short always occupy less memory than int?

Operations can't be carried on short or char types ...They are carried on int types...So promoted

.Write program in c++ find the position of min and max element in one dimension array.

iterate over the array, and track the current minimum and maximum element at each point. Thats the logic, write the program by yourself it is not hard if you try.

Let 2^x=n. n ^ log n = 2^(x*x) = O(2^(2^x)) = O(2^n)

https://dpaste.org/8ZGw NOT SHOWING ANY ERROR BUT IN VOID PLAY SECTION AFTER I PRESS ANY KEY THEN ENTER THE PROGRAM STOPS

In the above case, why quotient value is not getting updated into the mixture variable ? But if I replace the 'mixture' into some other variable like in the above case I had written 'loss' then the exact function will work.

mixture is an int variable. So if you store a floating point in it, the values after the decimal point get truncated. Also when printing an int, dont use %f. It leads to UB. When you use %f, usually (it is UB but this is what happens most of the times) the int value in memory will be interpreted as a float and according to IEEE specifications the int value 1 is a denormalized floating point with value very close to 0.0. It is infact the smallest possible representation of a floating point number just bigger than 0. Use %d and you will see that mixture has the value 1 You dont have this problem with loss because it is a float.

mixture is an int variable. So if you store a floating point in it, the values after the decimal point get truncated. Also when printing an int, dont use %f. It leads to UB. When you use %f, usually (it is UB but this is what happens most of the times) the int value in memory will be interpreted as a float and according to IEEE specifications the int value 1 is a denormalized floating point with value very close to 0.0. It is infact the smallest possible representation of a floating point number just bigger than 0. Use %d and you will see that mixture has the value 1 You dont have this problem with loss because it is a float.

1st #include<stdio.h> void printTwoOdd(int arr[], int size) {   int xor2 = arr[0];   int set_bit_no;    int i;   int x = 0, y = 0;   for(i = 1; i < size; i++)     xor2 = xor2 ^ arr[i];   set_bit_no = xor2 & ~(xor2-1);   for(i = 0; i < size; i++)   {      /* XOR of first set is finally going to hold one odd        occurring number x */     if(arr[i] & set_bit_no)       x = x ^ arr[i];     else       y = y ^ arr[i];   }     printf("\n The two ODD elements are %d & %d ", x, y); } int main() {   int arr[] = {4, 2, 4, 5, 2, 3, 3, 1};   int arr_size = sizeof(arr)/sizeof(arr[0]);   printTwoOdd(arr, arr_size);   getchar();   return 0; } 2nd #include<stdio.h> void print2odd(int arr[], int size) { int xor2 = arr[0], set, i, x = 0, y = 0; for(i = 0; i < size; i++) xor2 = xor2 ^ arr[i]; set = xor2 &~(xor2 - 1 ); for(i = 0; i < size; i++) { if(arr[i] & set) x = x ^ arr[i]; else y = y ^ arr[i]; } printf("%d & %d", x, y); } int main() { int arr[] = {4, 2, 4, 5, 2, 3, 3, 1}; int arrsize = sizeof(arr) / sizeof(arr[0]); print2odd(arr, arrsize); getchar(); return 0; }

Can anyone tell the difference between these 2 codes Am getting different outputs

Probably not the right answer since i dont think I fully understand what's the code purpose, but is it intentional you start first for cycle of print2odd with i = 0? The other version sets it to 1

I Waaaana find the odd occurance of 2 numbers in a arry

Write a program that takes the elements of an array from the input, calculates the factorial of each of them, and finds and prints the largest number of calculated values. (Specify the number of array elements by the user.

Write a program that takes the elements of an array from the input, calculates the factorial of each of them, and finds and prints the largest number of calculated values. (Specify the number of array elements by the user.

Yup. The second code is wrong. The initial value of i should be 1. By the way, you can use set_bit_no=xor2&(-xor2) instead of set_bit_no=xor2&~(xor2-1). They have same effect, but the former is better.

Opencv and pythons would be better

I don't think this is a python group 😅

Opencv and pythons would be better

Is opencv the best way to work with a webcam on Windows using C?

I understand. I thought about making a C program which recognize a face and put an image on, like a mask. A simple image, when you move your face the image follows you

I don't know if its the best but it would definitely work

I don't know about c, but using c++ you can work with qt&opencv

What are some ways to check execution time of my C++ program? I mainly need it for Competitive Programming purpose - I tried some online solutions, and each time I run it, it gives a different result (of execution time) :/

https://github.com/sharkdp/hyperfine

What are some ways to check execution time of my C++ program? I mainly need it for Competitive Programming purpose - I tried some online solutions, and each time I run it, it gives a different result (of execution time) :/

Analysing time complexity

...yeah but i want a precision based one lol

That is precision based

hein, you ain't getting me i want a display of time spent - like in seconds

I understand that but that doesn't really help anyway

Might help me

Fine...go ahead...do tell if it helps.