//* simple tests for function templates *
#include <iostream>
using std::cin;
using std::cout;
using std::endl;
// note: namespace std already has swap that is identical to ours
//              so we cannot simply import the whole namespace
//              and at the same time have our function named swap

template <typename T>
void swap (T &a, T &b) {
    T c=a; a=b; b=c;
}

template <typename T>
T maximum(T a, T b) {
    if (a>=b) return(a);
    else      return(b);
}

// note: this one will not work with string!
template <typename T>
T square(T x) {
    return(x*x);
}

int main(){
    // integer test
    cout << "int test - enter two values:" << endl;
    int a, b;
    cin >> a >> b;
    cout << maximum(a,b) << endl;
    cout << square(a) << endl;
    swap(a,b);
    cout << a << " " << b << endl;

    // char test
    cout << "char test - enter two values:" << endl;
    char c, d;
    cin >> c >> d;
    cout << maximum(c,d) << endl;;
    // cout << square(c) << endl;
    /* will compile but it will calculate a strange 
       square using integer numbers that are ASCII
       code of the passed character
       IT will not work for string for sure though :-) */
    swap(c,d);
    cout << c << " " << d << endl;

    // double test
    cout << "double test - enter two values:" << endl;
    double e, f;
    cin >> e >> f;
    cout << maximum(e,f) << endl;
    cout << square(e) << endl;
    swap(e,f);
    cout << e << " " << f << endl;

    return(0);
}
// TEMPLATES SHOULD BE DECLARED BEFORE THEY ARE USED!!!

// other templates that could be used for exercising:
// max(x,x), min(x,x,x), max(x,x,x), swap(x,x,x), ...

// at this time (given the data types you know about)
// you may (but do not have to) test:
//  - int, unsigned int, long int, unsigned long int
//  - short int, unsigned short int
//  - char, singend char
//  - double, float, long double
//  - string (you need to add the string library to this program)