Why error pls help me

#1
#2

if you are taking j<=e inside loop then that means you are executing at j=e also which make swap(arr[i],arr[j]) and increases “i” that mean you not need to return i+1; then return i;

but if you are taking j<e inside the loop then you are not executing at j=e then return i+1;

Modified Function :

int partition(int *arr,int s,int e){
    int i=s-1;
    for(int j=s;j<=e;j++){
        if(arr[j]<=arr[e]){
            i++;
            swap(arr[i],arr[j]);
        }   
    }
    swap(arr[i+1],arr[e]);
    return i;
}
1 Like
#3

thnx for detailed explanation.

#4

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