c++ 函数模板

template <类型形式参数表> 
返回类型 函数名(形式参数表)
{
    //do something
}

template<class T>
void fun(T t)
{
    //do something 
}

template <class type>
type Sum(type xvar, type yvar)
{
    return xvar + yvar;
}

int iret = Sum(10,20);
double dret = Sum(10.5,20.5)

int iret = Sum(10.5, 20);//error
double dret = Sum(10,20.5);//error

int iret = Sum<int>(10.5,20);
double dret = Sum<double>(10,20.5)

template<class Type>
Type min(Type a, Type b)
{
    if(a < b)
    {
        return a;
    }else 
    {
        return b;
    }
}
//重载函数模板
char* min(char* a, char* b)
{
    if(strcmp(a,b))
    {
        return b;
    }else
    {
        return a;
    }
}