c++ max-min

#include <iostream.h>
#include <conio.h>
void main()
{

int i,j,n;
float nilai[5],rata,jum,max,min,tukar;

cout<<"nilai 1="<<endl;
cin>>nilai[1];
max=nilai[1];
min=nilai[1];
jum=nilai[1];



for(i=2;i<=5;i++)
{
cout<<"inputkan nilai ke="<<i<<endl;
cin>>nilai[i];
jum=jum+nilai[i];
if(nilai[i]>max)
{
max=nilai[i];
}
else if(nilai[i]<min)
{
min=nilai[i];
}
}
rata=jum/5;
cout<<"jumlah nilai="<<jum<<endl;
cout<<"rata="<<rata<<endl;
cout<<"maxi="<<max<<endl;
cout<<"mini="<<min;

for(i=1;i<n-1;i++)
for(j=i+1;j<=n;j++)
{
cout<<inputkan data = "<<i<<endl ;
cin<<data [i];
cout<<inputkan data = "<<j<<endl ;
cin<<data [j];
if(data [i]>data [j]
{
data=nilai[i];
}
else if data [i]<data [j]
{
data=nilai[j];
}
}
cout<<"tukar = "<<i<<endl;
cout<<"data[i]data[j] = "<<j<<endl;
cout<<"data[j]= "<<tukar<<endl;
}
}