why this program is not running in proper way for bubble sort?

Question

#include<iostream>
using namespace std;
int main()
{
int n;
cin>>n;
int a[n];
for (int i=0;i<n;i++)
{
cin>>a[i];
}
for(int i=0;i<n-1;i++)
{
for(int j=0;j<n-1-i;j++)
if(a[j]>a[j+1])
{
int temp;
temp=a[j];
a[j]=a[j+1];
a[j+1]=a[j];
}
}
for(int i=0;i<n;i++)
{
cout<<a[i]<<" ";
}
}

Answer 1

Check your this part line no 17 here u defined temp variable and u not using anywhere check these statements

if(a[j]>a[j+1])
{
int temp;
temp=a[j];
a[j]=a[j+1];
a[j+1]=a[j];
}

Answer 2

Cross check with this example

https://www.sololearn.com/learn/650/?ref=app

Answer 3

Assign a[j+1] = temp