arrays

问题 I need some help filling a 2D array using a nested for loop. The desired output is this... 20.0 19.0 18.0 17.0 16.0 15.0 14.0 13.0 12.0 11.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 19.0 18.0 17.0 16.0 15.0 14.0 13.0 12.0 11.0 10.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 18.0 17.0 16.0 15.0 14.0 13.0 12.0 11.0 10.0 9.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 17.0 16.0 15.0 14.0 13.0 12.0 11.0 10.0 9.0 8.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0

问题 This code throws up the compile error given in the title, can anyone tell me what to change? #include <iostream> using namespace std; int main(){ int myArray[10][10][10]; for (int i = 0; i <= 9; ++i){ for (int t = 0; t <=9; ++t){ for (int x = 0; x <= 9; ++x){ for (int y = 0; y <= 9; ++y){ myArray[i][t][x][y] = i+t+x+y; //This will give each element a value } } } } for (int i = 0; i <= 9; ++i){ for (int t = 0; t <=9; ++t){ for (int x = 0; x <= 9; ++x){ for (int y = 0; y <= 9; ++y){ cout <<

问题 This code throws up the compile error given in the title, can anyone tell me what to change? #include <iostream> using namespace std; int main(){ int myArray[10][10][10]; for (int i = 0; i <= 9; ++i){ for (int t = 0; t <=9; ++t){ for (int x = 0; x <= 9; ++x){ for (int y = 0; y <= 9; ++y){ myArray[i][t][x][y] = i+t+x+y; //This will give each element a value } } } } for (int i = 0; i <= 9; ++i){ for (int t = 0; t <=9; ++t){ for (int x = 0; x <= 9; ++x){ for (int y = 0; y <= 9; ++y){ cout <<

问题 The title summarizes the goal that is more exactly to dynamically retrieve the number of dimensions of MATLAB arrays passed to armadillo matrices. I would like to change the second and third arguments of mY() and mD() to parametric ones below. // mat(ptr_aux_mem, n_rows, n_cols, copy_aux_mem = true, strict = false) arma::mat mY(&dY[0], 2, 168, false); arma::mat mD(&dD[0], 2, 168, false); This must be definitely a common use case, but I still could not find a nice way of achieving it for the

问题 I am trying to get list or emails in a one-dimensional array from MySQL database. However, I am getting multidimensional array, rather then array: $query = "SELECT DISTINCT `EmailAddress` FROM `Emails` WHERE `JobID` = 1"; $result = $conn->query($query); if (!$result) { printf("Query failed: %s\n", $mysqli->error); exit; } while ($row = $result->fetch_row()) { $rows[] = $row; } $result->close(); $conn->close(); var_dump($rows); // This will return array(2) { [0]=> array(1) { [0]=> string(24)

问题 The title summarizes the goal that is more exactly to dynamically retrieve the number of dimensions of MATLAB arrays passed to armadillo matrices. I would like to change the second and third arguments of mY() and mD() to parametric ones below. // mat(ptr_aux_mem, n_rows, n_cols, copy_aux_mem = true, strict = false) arma::mat mY(&dY[0], 2, 168, false); arma::mat mD(&dD[0], 2, 168, false); This must be definitely a common use case, but I still could not find a nice way of achieving it for the

问题 The title summarizes the goal that is more exactly to dynamically retrieve the number of dimensions of MATLAB arrays passed to armadillo matrices. I would like to change the second and third arguments of mY() and mD() to parametric ones below. // mat(ptr_aux_mem, n_rows, n_cols, copy_aux_mem = true, strict = false) arma::mat mY(&dY[0], 2, 168, false); arma::mat mD(&dD[0], 2, 168, false); This must be definitely a common use case, but I still could not find a nice way of achieving it for the

问题 I have two arrays, one stores the distance of the cities and the other stores the corresponding population. Everything works fine if the distance of the cities is in ascending order. But let say if someone inputs the distance randomly. How can I sort the cities array and also make sure that the population of the respective city is in the same index as the index of its respective city population. For example: City 1 has population 333 City 3 has population 33333 City 5 has population 33 int[]

问题 I'm new to C# and looking at arrays. Given: int[][] myJagArray = new int[5][]; Why does the following print the types of j (System.Int32[]), and not each j's contents? foreach (int[] j in myJagArray) { Console.WriteLine("j : {0}",j); } 回答1: Because Array.ToString() does not return the contents of the array, it returns the type name, and Console.WriteLine implicitly calls ToString() on each object you send it as a parameter. This has no regard to the fact that the array is part of a multi

问题 I'm new to C# and looking at arrays. Given: int[][] myJagArray = new int[5][]; Why does the following print the types of j (System.Int32[]), and not each j's contents? foreach (int[] j in myJagArray) { Console.WriteLine("j : {0}",j); } 回答1: Because Array.ToString() does not return the contents of the array, it returns the type name, and Console.WriteLine implicitly calls ToString() on each object you send it as a parameter. This has no regard to the fact that the array is part of a multi