# How do you return a double array in C++?

## How do you return a double array in C++?

Use Pointer to Pointer Notation to Return 2D Array From Function in C++ As an alternative, we can use a pointer to pointer notation to return the array from the function. This method has an advantage over others if the objects to be returned are allocated dynamically.

### How do you pass and return a 2D array to a function in C++?

Passing two dimensional array to a C++ function

1. Specify the size of columns of 2D array void processArr(int a[][10]) { // Do something }
2. Pass array containing pointers void processArr(int *a[10]) { // Do Something } // When callingint *array[10]; for(int i = 0; i < 10; i++) array[i] = new int[10]; processArr(array);

#### How do I return an array from a function in C++?

Return Array from Functions in C++ C++ does not allow to return an entire array as an argument to a function. However, you can return a pointer to an array by specifying the array’s name without an index.

How do you calculate a double array?

By Row Major Order If array is declared by a[m][n] where m is the number of rows while n is the number of columns, then address of an element a[i][j] of the array stored in row major order is calculated as, Address(a[i][j]) = B. A. + (i * n + j) * size.

How do I return a 2D char array from a function?

Here is what I want to do: Take a 2D char array as an input in a function, change the values in it and then return another 2D char array. That’s it….

1. it is 50×50.
2. Yes, if you’re dealing with an actual 2D array (i.e., an array of arrays).
3. in that case, use int[][50] MyFunction(int[][50] array2d) { }

## How do you pass a 2D matrix in C++?

There are three ways to pass a 2D array to a function:

1. The parameter is a 2D array int array[10][10]; void passFunc(int a[][10]) { // …
2. The parameter is an array containing pointers int *array[10]; for(int i = 0; i < 10; i++) array[i] = new int[10]; void passFunc(int *a[10]) //Array containing pointers { // …

### What is two-dimensional array C++?

A two-dimensional array in C++ is the simplest form of a multi-dimensional array. It can be visualized as an array of arrays. The image below depicts a two-dimensional array. 2D Array Representation. A two-dimensional array is also called a matrix.

#### Is there any way of passing 2 D array to a function without knowing any of its dimensions?

Okey, so 2D arrays of any size can’t be passed. But you can make an array of pointers to 1D array’s, and pass that. You can also pass the address of the first element and use that to calculate where [x][ y] are located.

How do I return a char?

“How to return a char array from a function in C” Code Answer

1. char * createStr() {
2. char char1= ‘m’;
3. char char2= ‘y’;
4. char *str = malloc(3);
5. str[0] = char1;
6. str[1] = char2;
7. str[2] = ‘\0’;

Can a function return a function?

A function is an instance of the Object type. You can store the function in a variable. You can pass the function as a parameter to another function. You can return the function from a function.

## How do you pass a 2D array to a function with pointers?

1. #include
2. // Here, the parameter is an array of pointers. void assign(int** arr, int m, int n)
3. { for (int i = 0; i < m; i++)
4. { for (int j = 0; j < n; j++) {
5. arr[i][j] = i + j; }
6. } }
7. // Program to pass the 2D array to a function in C.
8. int main(void) {

### How do you pass a 2D vector to a function?

Passing a 2D Vector to the function Here the size of each vector in the 2d vector can be dynamic and different, whereas in 2D array this is not possible. A 2D vector can be passed to the function in the same way as 1D vector, using both: Pass By Value. Pass By Reference.