Definition - Array:
Advantage:
Declaring an array in c++:
int balance[5];
int - integer data type
balance - array name
5 - size of the array
2 dimensional Array:
Syntax: data_type array_name [size1][size2];
example:
int balance[4][3];
The above example creates an array with 4*3 = 12 elements.
Here 4 denotes the number of rows
3 denotes the number of columns.
Description:
Column 0 | column 1 | column 2 | |
Row 0 | Array[0][0] | Array[0][1] | Array[0][2] |
Row 1 | Array[1][0] | Array[1][1] | Array[1][2] |
C++ program for 2 dimensional array:
#include <iostream>
using namespace std;
class TwoDimensional
{
public: //access specifier
void createArray()
{
int row, col; //varibale declaration
cout << "Please enter the rows size: " << endl;
//message displayed to user.
cin >> row; //to read data(number of rows) from user
cout << "Please enter the column size: " << endl;
cin >> col; //to read data(number of columns) from user
cout << "Please enter the numbers you want to put into a 2D
array" << endl;
cout << "Press enter after each number you input: " <<
endl;
int arr[row][col]; //2 dimensional array declaration
//for loop to read the 2 dimensional array from user
for (int i = 0; i < row; ++i) {
for (int j = 0; j < col; j++) {
cin >> arr[i][j];
}
}
//for loop To print the array
for(int i=0;i<row;i++) {
for(int j=0;j<col;j++) {
cout << arr[i][j] << " ";
}
cout << endl;
}
cout << endl;
}
};
int main()
{
TwoDimensional td; //To create an object(td) for the class
TwoDimensional
td.createArray(); //function call to createArray
return 0;
}
Output:
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