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I try to solve this problem. I checked the code logically but I couldn’t find the mistake
when i write this code on online compiler it worked

// selection sort code


#include <bits/stdc++.h>
using namespace std;
void selectionsort(int arr[],int n){
    for(int i=0;i<=n-2;i++){
        int min=i;
        for (int j=i;j<=n-1;j++){
            if(arr[j]<arr[min])
            min=j;
        }
        swap(arr[i],arr[min]);
    }
}
int swap(int a, int b){
    int temp=a;
    a=b;
    b=temp;
    return a,b;
}
int main(){
    int n;
    cin>>n;
    int arr[n];
    for(int i=0;i<n;i++){
    cin>>arr[i];
    }
    selectionsort(arr,n);
    for(int i=0;i<n;i++){
        cout<<arr[i]<<" ";
    }
return 0;    
}

I was trying to solve this in gfg