Dutor

#include <iostream>
#include <iomanip>
//~ #include <sqlite.h>
//~ #include <mysql/mysql.h>
using namespace std;
template <unsigned int x, unsigned int y, bool is_ordered = (x >= y)> //~ 一般情况下x>=y
struct static_gcd 
{ 
    static int const value = static_gcd<y, x % y>::value; 
}; 
 
template <unsigned int x, unsigned int y> 
struct static_gcd<x, y, false> //~ 初始情况可能会是x<y
{ 
    static int const value = static_gcd<y, x>::value; 
}; 
 
template <unsigned int x> 
struct static_gcd<x, 0, true> //~ 递归的终止条件
{ 
    static int const value = x; 
}; 
 
template <unsigned int x> 
struct static_gcd<x, 1, true> //~ 递归的终止条件，可以省略
{ 
    static int const value = 1; 
}; 
int
main ()
{
    cout<<static_gcd<24, 32>::value<<endl;
    return 0;
}