C++ language One dimension Array

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C++ language One dimension Array

In this tutorial, we will discuss the One dimension Array in C++ language

Knowledge Area

What is Array
Type of Arrays
Declaration of one dimension Array
Array Initialization
Array processing

One of the data structure in C++, The Array helps a serious of the variable (when we need continuously data type accessed) of the same type of element to placed in the memory location.

Array index- It is a unique identifier used to individually referenced memory location.

Three types of arrays in C programming language

1. One dimensional array
2. Two-dimensional array
3. multidimensional array

One D array

One dimension Array in C++

Array declaration in C++

When programmers declare the array, Two important factors are required by an array as follows

Type of the element
Number of element

Syntax

Data_type Array_name[elements];

eg:
int marks[30];
float student height[45];
char alphabet[26];

Array Declaration

int marks[6];

Array declaration

Initiation of Array

initialization – Using standard method

marks[0]=45;//initialize element to marks[0] index

Example

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int arr[5];//declaration of one D array

    //initializing one D array
    arr[0]=45;//store first element
    arr[1]=57;
    arr[2]=97;
    arr[3]=68;
    arr[4]=68;//store forth element

    //Displaying element from array

    cout << "Element of arr[0]= "<<arr[0] << endl;
     cout << "Element of arr[1]= "<<arr[1] << endl;
      cout << "Element of arr[2]= "<<arr[2] << endl;
       cout << "Element of arr[3]= "<<arr[3] << endl;
        cout << "Element of arr[4]= "<<arr[4] << endl;
        getch();
    return 0;
}

When the above code is executed it produces the following result

Output

initialization during declaration

Syntax

data_Type array_name[array_size]={element_list};

Example

1. int marks[6]={56, 67, 78, 89, 63, 36};

Array initialization

2. float height[4]={84.5, 87.8, 91.5, 74.5};

Array initialization

Explanation of initialization an array

method 1

int marks[]={19,10,45,67,78,98}

method 2

int marks[6]={19,10,45,67,78,98}

Explanation

19 is placed to marks[0];

10 is placed to marks[1];

45 is placed to marks[2];

67 is placed to marks[3];

78 is placed to marks[4];

98 is placed to marks[5];

Insert and display the element of Array

replace a different value or insert the value to the fifth element in array length

marks[4]=7;//insert value to forth index

get input from the user and insert the element of third place in array length

cin>>marks[2];//store value to second index

get input from the user and insert the element of (i+1) in array length

cin>>marks[i];

print first element of an array

cout<<marks[0];//display value from zero index

print (I)th element of an array

cout<<marks(i-1);

Example 1

#include <iostream>
using namespace std;
int main()
{  int marks[5]={17,56,47,53,78};
    cout << marks[0] << endl;
    cout << marks[1] << endl;
    cout << marks[2] << endl;
    cout << marks[3] << endl;
    cout << marks[4] << endl;
    return 0;
}

When the above code is executed it produces the following result

Output

Input and display array elements using loops

Using for loop

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int arr[10],i;

    cout << "Enter the 10 numbers for array" << endl;
    for(i=0; i<10; i++){
        cin>>arr[i];//store array elements
    }

    cout << "Your entered elements display here" << endl;
    for(i=0; i<10; i++){
        cout << "you entered to index arr["<<i<<"]: "<<arr[i] <<endl;
    }
    getch();
    return 0;
}

When the above code is executed it produces the following result

Output

Using while loop

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int arr[10],i;

    cout << "Enter the 10 numbers for array" << endl;
    i=0;
    while(i<10){
        cin>>arr[i];//store array elements
         i++;
    }

    cout << "Your entered elements display here" << endl;
    i=0;
    while(i<10){
        cout << "you entered to index arr["<<i<<"]: "<<arr[i] <<endl;
         i++;
    }
    getch();
    return 0;
}

When the above code is executed it produces the following result

Output

Using do-while loop

using namespace std;

int main()
{
    int arr[10],i;

    cout << "Enter the 10 numbers for array" << endl;
    i=0;
    do{
        cin>>arr[i];//store array elements
         i++;
    }while(i<10);

    cout << "\nYour entered elements display here\n" << endl;
    i=0;
    do{
        cout << "you entered to index arr["<<i<<"]: "<<arr[i] <<endl;
         i++;
    }while(i<10);
    getch();
    return 0;
}

When the above code is executed it produces the following result

Output

One dim Array in Java One dim Array in C++ One dim Array in C

Two dim Array in Java Two dim Array in C++ Two dim Array in C

Three dim Array in Java Three dim Array in C++ Three dim Array in C

Array programs c++ language