C++ Array to Function

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In C++, when you pass an array to a function, you're actually passing a pointer to the first element of the array. This means the function receives a reference to the array, allowing it to access and modify the array's elements.

Here's how you can pass an array to a function and perform various operations:

1. Printing Array Elements

To print the elements of an array, you can pass the array and its size to a function. Here's an example:

<#include <iostream>>
<using namespace std;>

// Function to print array elements
void printArray(int arr[], int size) {
  for (int i = 0; i < size; ++i) {
    cout << arr[i] << " ";
  }
  cout << endl;
}

int main() {
  int numbers[] = {10, 20, 30, 40, 50};
  int size = sizeof(numbers) / sizeof(numbers[0]);

  printArray(numbers, size); // Pass array and its size to the function

  return 0;
}

Output:

10 20 30 40 50

2. Finding the Minimum Number in an Array

To find the minimum number in an array, pass the array and its size to a function that iterates through the array and determines the smallest value.

<#include <iostream>>
<using namespace std;>

// Function to find the minimum number in an array
int findMin(int arr[], int size) {
  int min = arr[0];
  for (int i = 1; i < size; ++i) {
    if (arr[i] < min) {
      min = arr[i];
    }
  }
  return min;
}

int main() {
  int numbers[] = {10, 20, 5, 40, 50};
  int size = sizeof(numbers) / sizeof(numbers[0]);

  int min = findMin(numbers, size); // Pass array and its size to the function
  cout << "The minimum number is: " << min << endl;

  return 0;
}

Output:

The minimum number is: 5

3. Finding the Maximum Number in an Array

To find the maximum number in an array, use a similar approach as finding the minimum, but look for the largest value.

<#include <iostream>>
<using namespace std;>

// Function to find the maximum number in an array
int findMax(int arr[], int size) {
  int max = arr[0];
  for (int i = 1; i < size; ++i) {
    if (arr[i] > max) {
      max = arr[i];
    }
  }
  return max;
}

int main() {
  int numbers[] = {10, 20, 30, 40, 50};
  int size = sizeof(numbers) / sizeof(numbers[0]);

  int max = findMax(numbers, size); // Pass array and its size to the function
  cout << "The maximum number is: " << max << endl;

  return 0;
}

Output:

The maximum number is: 50

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