How to return array from function c++

Can we return an array from a function 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. … Just declare the array inside a struct. You can return the struct variable from any function.

How do you return an array from a function?

There are two ways to return an array indirectly from a function.

  1. Return pointer pointing at array from function. C does not allow you to return array directly from function. …
  2. Pass the returned array as parameter.

How do you return an index from an array in C++?

  1. using namespace std; int main() { …
  2. int n = sizeof(arr)/sizeof(arr[0]); int elem = 2; auto itr = find(arr, arr + n, elem);
  3. if (itr != end(arr)) { cout << “Element ” << elem << ” is present at index ” << distance(arr, itr) << ” in the given array”; …
  4. cout << “Element is not present in the given array”; } return 0;

How do you return a function in C++?

return Statement (C++)

Terminates the execution of a function and returns control to the calling function (or to the operating system if you transfer control from the main function). Execution resumes in the calling function at the point immediately following the call.

How do you return a vector array in C++?

Create a function and declare its return type as vector and then return the vector. Just construct the vector and return it by value.

Lets say you have to return an int vector:

  1. std::vector <int> foo(/*parameters here*/) {
  2. std::vector <int> temp_arr;
  3. //write your awesome code :D.
  4. return temp_arr;
  5. }
See also:  How to use cin in c++

How do I return a 2d array in C++?

If you want to return a 2D array then you’ll have to use a pointer to a pointer, a much cleaner alternative is:

  1. std::vector<std::vector<int>> 2DArray(int h, int w){
  2. return std::vector<std::vector<int>>(h, std:vector<int>(w, 1));
  3. }

How do I return a dynamic array in C++?

4 Answers. In C++, you can’t return a variable of an array type (i.e. int arr[] ) from a function “as is”, though you can return a reference or a pointer to an array. That is some fairly clumsy syntax though. In the code shown, there is no array, rather a pointer to a chunk of dynamically allocated memory.

How do you return an array of strings?

In C, a null terminated sequence of char s is considered a string. It is usually represented by char* . You pretty much can’t return an array, neither a pointer to a local array. You could however pass the array to build_array as an argument, as well as its size , and fill that instead.

Why do we use return 0 in C?

In C and C++ programs the main function is of type int and therefore it should return an integer value. The return value of the main function is considered the “Exit Status” of the application. On most operating systems returning 0 is a success status like saying “The program worked fine”.

How do I print the index of an array?

You can access an array element using an expression which contains the name of the array followed by the index of the required element in square brackets. To print it simply pass this method to the println() method.

See also:  How to print vector c++

What is an array index in C++?

Arrays in C++

An array is a collection of elements of the same type placed in contiguous memory locations that can be individually referenced by using an index to a unique identifier. Five values of type int can be declared as an array without having to declare five different variables (each with its own identifier).

How do you find the index value of an array?

JavaScript Array findIndex() Method

The findIndex() method executes the function once for each element present in the array: If it finds an array element where the function returns a true value, findIndex() returns the index of that array element (and does not check the remaining values)

How do you return a void function in C++?

Return from void functions in C++

  1. A void function can do return. We can simply write return statement in a void fun(). …
  2. A void fun() can return another void function.
  3. A void() can return a void value. A void() cannot return a value that can be used.

29 мая 2017 г.

Does return end a function C++?

The return statement stops execution and returns to the calling function. When a return statement is executed, the function is terminated immediately at that point, regardless of whether it’s in the middle of a loop, etc.

Leave a Comment

Your email address will not be published. Required fields are marked *