Bubble sort in C++

 #include<iostream>  //header file

using namespace std;    //header file

int main()   //main function

{

int i,j,temp=0,n,a[20];     //declaration and initialization of variables

cout<<"Enter the array size : \n";    //prints the msg on output screen

cin>>n;  //stores value in variable n

cout<<"\nEnter the array element:\n";   //prints the msg on output screen

for(i=0;i<n;i++)    //for loop runs from i=0 to i=n-1

cin>>a[i];      //stores value in a[i]

for(i=0;i<n;i++)   //for loop runs from i=0 to i=n-1

{

for(j=0;j<n-i;j++)    //for loop runs from j=0 to j=n-i

{

if(a[j]>a[j+1])    //if block

{

temp=a[j];     //storing value of a[j] in temp

a[j]=a[j+i];      //storing value of a[j +1] in a[j]

a[j+1]=temp;    //storing value of  temp in a[j+1]

} 

}

}

cout<<"sorted array:\n";  //prints the msg on output screen

for(i=0;i<n;i++)     //for loop runs from i=0 to i=n-1

cout<<"%d\t",a[i];

return 0;

}

Output:

Enter the array size : 

3

Enter the array element:

44

33

66

sorted array:

33     44      66