Initialization of multidimensional array of zeros using C++

Hello coders, in this tutorial we will learn about how to initialize a multidimensional array of zeros. Before we proceed let’s discuss what is a multidimensional array, We can say that it is a combination of the number of rows and columns, We can also say that multidimensional array is an array containing one or more arrays.

A multidimensional array with zeros

Now I will show you the whole code for the multidimensional array with zeros then we will discuss the whole code step by step to understand it clearly so be patient.

 Write a program to create a multidimensional array of size 3×3 with zeros.

#include<iostream>
using namespace std;
int main(){
  int ar[3][3],i,j;
  //Initilization of array with zeros
  for(i=0;i<3;i++){
    for(j=0;j<3;j++){
      ar[i][j]=0;
        }
      }
        cout<<"Mulyidimensional array with zeros";
  for(i=0;i<3;i++){
    for(j=0;j<3;j++){
      cout<<ar[i][j]<<" ";}
    cout<<"\n";}		}

 

 Let’s start from line 1,

#include<iostream>

This line is used to include the header file of name iostream and iostream is used for standard input\output.

Now line 2,

using namespace std;

“using namespace std” means we use the namespace named std. it provides us scope to the identifiers, functions.

Now line 3

int main()

This is the main function that is executed after the compilation of the code.

Line 4,

int ar[3][3],i,j;

This line creates an array of 3×3.

Now line 6,7,8,

for(i=0;i<3;i++)

for(j=9;j<3;j++)

ar[i][j]=0;

This is a loop first for loop defines for number of row (i,e.,  i = 0,1,2) and second for loop is for number of columns(i.e .,  j = 0,1,2,)

Now when i=0 for this j=0,1,2

this will create combinations of [i][j] that are  [0][0],[0][1], [0][2].

Similary when i=1 then combinations are  [1][0],[1][1],[1][2]

when i=2 then combinations are [2][0],[2][1],[2][2]

and ar[i][j] stores value 0 for every combination for [i][j]

Now the lines 11,12,13,14 are used to print array.

for(i=0;i<3;i++)

for(j=0;j<3;j++)

cout<<ar[i][j]<<” “;       Print each element of index [i][j]

cout<<“\n”;

Command:

For compiling:- g++ filename

For execution:- ./a.exe

Output:-

Multidimensional array with zeros
0 0 0
0 0 0
0 0 0