Sorting of multiple number in structure of array in Cpp

 Program:-

#include <bits/stdc++.h>
using namespace std;
struct number{
    int a,b,c;
};
static bool comp(struct number aa, struct number ba){
    return aa.a<ba.a;
}

int main() {
    int n;
    cin>>n;
    struct number arr[n];
    for(int i=0;i<n;i++)
    {
      int a,b,c;
        cin>>a>>b>>c;
        arr[i].a=a;
        arr[i].b=b;
        arr[i].c=c;
    }  
    sort(arr,arr+n,comp);
    for(int i=0;i<n;i++)
        cout<<arr[i].a<<" "<<arr[i].b<<" "<<arr[i].c<<endl;
    return 0;
}