定义一个类模版，在类模版外定义各成员函数利用它分别实现俩个整数、浮点数和字符的比较，求出大数和小数

下面是一个类模板的定义，用于比较两个数的大小：

template<typename T>
class Compare {
public:
    static T max(const T& a, const T& b);
    static T min(const T& a, const T& b);
};

在类模板之外，可以定义成员函数来实现具体的比较操作。比如，下面的代码实现了对两个整数、浮点数和字符的比较，并求出大数和小数：

template<typename T>
T Compare<T>::max(const T& a, const T& b) {
    return a > b ? a : b;
}

template<typename T>
T Compare<T>::min(const T& a, const T& b) {
    return a < b ? a : b;
}

int main() {
    int x = 10, y = 20;
    float a = 1.5, b = 2.5;
    char c = 'a', d = 'b';
    
    cout << "Max of " << x << " and " << y << " is " << Compare<int>::max(x, y) << endl;
    cout << "Min of " << x << " and " << y << " is " << Compare<int>::min(x, y) << endl;
    
    cout << "Max of " << a << " and " << b << " is " << Compare<float>::max(a, b) << endl;
    cout << "Min of " << a << " and " << b << " is " << Compare<float>::min(a, b) << endl;
    
    cout << "Max of " << c << " and " << d << " is " << Compare<char>::max(c, d) << endl;
    cout << "Min of " << c << " and " << d << " is " << Compare<char>::min(c, d) << endl;
    
    return 0;
}

输出结果：

Max of 10 and 20 is 20
Min of 10 and 20 is 10
Max of 1.5 and 2.5 is 2.5
Min of 1.5 and 2.5 is 1.5
Max of a and b is b
Min of a and b is a