--c++ implementation of various sorting algorithms

#include <iostream> using namespace std;  Heap sort void findmaxinheap (int arr[], int size) {for (int j = size-1 J > 0;j-) {int parent = j/   
        2;   
        int child = J;   
        if (J < size-1 && Arr[j] < arr[j+1]) {++child;   
            } if (Arr[child] > Arr[parent]) {int tmp = Arr[child];   
            Arr[child] = arr[parent];   
        Arr[parent] = tmp; }} void Heapsort (int arr[], int size) {for (int j = size; j > 0; j--) {Findmaxinhe   
        AP (arr, J);   
        int tmp = arr[0];   
        Arr[0] = arr[j-1];  
		
    ARR[J-1] = tmp;
	}//Quick sort void quicksort (int a[],int left,int right) {int i,j,temp;
	I=left;
	J=right;
	Temp=a[left];
	if (left>right) return;
		while (I!=J) {while (a[j]>temp && j>i) j--;
		if (j>i) a[i++]=a[j];
		while (a[i]<temp && j>i) i++;
		if (j>i)	A[j--]=a[i];
	} a[i]=temp;
	Quicksort (a,left,i-1);
Quicksort (A,i+1,right);
	//select sort void selectsort (int a[],int len) {int i,j,min,temp;
		for (i=0;i<len;i++) {min=i;
			for (j=i+1;j<len;j++) {if (A[j]<a[min]) {min=j;
			} if (min!=i) {temp=a[i];
			A[i]=a[min];
		A[min]=temp;
	Direct insert sort void insertsort (int a[],int len) {int i,j,temp,min;
		for (j=1;j<len;j++) {min=a[j];
				for (i=j-1;i>=0;i--) {if (a[i]>min) {temp=a[i];
				A[I]=A[I+1];
				A[i+1]=temp;
			Min=a[i];
	}}//bubble sort void bubblesort (int a[],int len) {int i,j,temp,is_swp;
				for (i=0;i<len;i++) {for (j=0;j<len-i-1;j++) {if (a[j]>a[j+1]) {temp=a[j];
				A[J]=A[J+1];
			A[j+1]=temp;
}} return;   
    int main () {int arr[] = {13, 5, 3, 12, 6, 21, 8, 19};
	int n = sizeof (arr)/sizeof (arr[0));
    cout<< "Sort result:" <<endl;  
	Heapsort (arr, n);
	Quicksort (arr,0,n-1);
	Selectsort (Arr,n); InsErtsort (Arr,n);
	Bubblesort (Arr,n);
    for (int i=0;i<n;i++) cout<<arr[i]<< "";  
	cout<<endl;
return 0; }