Cpp Array

All Topics

Cpp Array

1. C++ Arrays and Their Implementations:

In C++, an array is a collection of elements of the same data type stored in contiguous memory locations. You declare an array by specifying the data type of its elements and its size.

int myArray[5]; // Declares an integer array with 5 elements.

2. C++ Arrays and Loops:

You can use loops, like for or while, to iterate through array elements and perform operations on them.

int myArray[5] = {1, 2, 3, 4, 5};
for (int i = 0; i < 5; i++) {
    cout << myArray[i] << " ";
}
// Output: 1 2 3 4 5

3. C++ Omit Array Size:

In C++, you can omit the size of an array if you initialize it with values. The compiler will automatically determine the size.

int myArray[] = {1, 2, 3}; // Array size is 3

4. C++ Array Size:

You can determine the size of an array using the sizeof operator.

int myArray[] = {1, 2, 3, 4, 5};
int size = sizeof(myArray) / sizeof(myArray[0]);
cout << "Array size: " << size << endl;
// Output: Array size: 5

5. C++ Multi-Dimensional Arrays:

C++ allows you to create multi-dimensional arrays, such as 2D arrays. These are arrays of arrays, forming a grid-like structure.

Example of a 2D array:

int matrix[3][3] = {
    {1, 2, 3},
    {4, 5, 6},
    {7, 8, 9}
};

To access elements of a 2D array:

int element = matrix[1][2]; // Accessing the element at row 1, column 2 (value 6)

You can also use nested loops to iterate through the elements of a multi-dimensional array.

Example of iterating through a 2D array:

for (int i = 0; i < 3; i++) {
    for (int j = 0; j < 3; j++) {
        cout << matrix[i][j] << " ";
    }
    cout << endl;
}
// Output:
// 1 2 3
// 4 5 6
// 7 8 9

These are the fundamental concepts of working with arrays in C++. You can use these principles to create, manipulate, and iterate through arrays of various dimensions.

Cpp Break and continue

Cpp Structures

Next Topic

Cpp Function Overloading

All Topics

Cpp Array

Next Topic

All Courses

C Language

CPP Language

Python Language