Advertisements I have a multidimensional array and i’m trying to get the length of each column. But it’s returning 20 for all of them. int buttons[16][5] = {{0, 4, 1},{1, 0, 2, 5},{2, 1, 3, 6},{3, 2, 7},{4,0,5,8},{5,1,4,6,9},{6,2,5,7,10},{7,3,6,11},{8,4,9,12},{9,5,8,10,13},{10,6,9,11,14},{11,7,10,15},{12,8,13},{13,9,12,14},{14,10,13,15},{15,11,14}}; sizeof(buttons[0]); >Solution : You are declaring an C-style array where each element is an array of 5… Read More get length of multidimensional array with different length in c++?

Advertisements i have code that have a global array of object, when i create it i already assign the objects, but before start using it on the code i have to reassign the values of the array on the function setup so i can access the objects inside it the code that create the vector… Read More having to reassign the values of a array of objects to work in c++/arduino

Advertisements The code below, without the if statement, count’s up from 1 to infinite and shows this in the console as intended. If I add the if statement, I get what’s shown in the screenshot below. Why does this happen? #include <Arduino_MKRIoTCarrier.h> MKRIoTCarrier carrier; int a; int r,g,b; void setup() { // put your setup… Read More Why is my variable jumping in value when I add an "if" condition?

Advertisements I am trying something new with flask, Python and the arduino. I want to measure things with the arduino, calculate and save some values through phyton and put it on display through flask. Right now I can make sure that the arduino receives and gives information and the displaying to a localhost worked. However… Read More 'dict' object has no attribute 'mean'. Problems using statistics.mean(list with numbers)

Advertisements I’m a C/C++ beginner and trying to build a simple script. I’m running this on an Arduino. #include <Arduino.h> int pin_locations[3][3] = { {8, 5, 4}, {9, 6, 3}, {10, 7, 2} }; void setup() { for (int i=0; i<3; ++i) { for (int j=0; j<3; ++j) { pinMode(pin_locations[i][j], OUTPUT); } } } void… Read More Trying to pass 2D array to function and getting a compiler error

Advertisements i want to calculate the "char*" and give back the result as a "double" (or "float"). char* calculation = "2+2*2"; double result = atof(calculation); double result: 2.00 The problem is that it just doesn’t calculate automatically and just stops scanning the "char*" at the "+". Any ideas? And NO I don’t want to declare… Read More Calculating a "char*" calculation and give back the result as a "double" (or "float")