Bubble sort

#include <iostream> 
using namespace std; 
template <class X> void bubble(X *data, int size) 
{ 
register int a, b; 
X t; 
for(a=1; a < size; a++) 
for(b=size-1; b >= a; b--) 
if(data[b-1] > data[b]) 
{ 
t = data[b-1]; 
data[b-1] = data[b]; 
data[b] = t; 
} 
} 
int main() { 
int i[] = {3, 2, 5, 6, 1, 8, 9, 3, 6, 9}; 
double d[] = {1.2, 5.5, 2.2, 3.3}; int j; 
bubble(i, 10); // sort ints 
bubble(d, 4); // sort doubles 
for(j=0; j<10; j++) 
cout << i[j] << ' '; cout << endl; 
for(j=0; j<4; j++) 
cout << d[j] << ' '; 
cout << endl; 
return 0; 
}