Selection Sort in C++

#include<iostream>
#include<conio.h>
using namespace std;
int main()
{
	int arraylength,num[1000],num1,d,num2=0;
	cout<<"Enter the total no. of element: ";
	cin>>arraylength;
 
	for(int i=0;i<arraylength;i++)
    { cout<<"Enter No."<<i+1<<": ";
		cin>>num[i],num[d]; }
 
     { cout<<" \n" << endl; }
     for(int d=0;d<arraylength;d++){
     cout<<num[d]<<" " << "\n" << endl;
 
 
	cout<<"UNSORTED ARRAY : ";
	for(int i =0;i<arraylength;i++){
		cout<<num[i]<<" ";
	}	
 
 
	cout<<endl<<"SORTED ARRAY : ";
 
	for(int a=0; a<arraylength-1;a++){
		for(int b=0; b<arraylength-a-1;b++){
			if(num[b]<num[b+1]){
				num1=num[b];
				num[b]=num[b+1];
				num[b+1]=num1;
			}
		}
	}
	for(int r=0;r<arraylength;r++){
		cout<<num[r]<<" ";
	}
}	
getch();
return 0;		
}