/*************************************
 * File:    temp.cpp
 * Author:  Katherine Gibson
 * Date:    4/19/2016
 * Section: N/A
 * E-mail:  k38@umbc.edu
 * Description:
 *   This program shows the basics of 
 *   how to use templated functions.
 *************************************/

#include <stdexcept>  // lets us use standard exceptions
#include <iostream>
#include <vector>
using namespace std;


/* minVector() is a templated function that returns a vector's minimum
 * Input:  a vector of type template (T)
 * Output: the minimum value from that vector (of type T) 
 */
template <class T>
T minVector( vector <T> vec);

/* createVectors() populates three vectors for testing
 * Input:  3 empty vectors (int, string, and char)
 * Output: 3 vectors populated with multiple entries
 */
void createVectors(vector <int>  &ints, vector <string> &strs, 
		   vector <char> &chars);


int main() {
   vector <int>    ints;
   vector <string> strs;
   vector <char>   chars;

   // if we comment out this line of code, we'll have an exception thrown
   createVectors(ints, strs, chars);

   try {
      cout << "Minimum of ints    is "   << minVector(ints)  << endl;
      cout << "Minimum of strings is \"" << minVector(strs)  << "\"" << endl;
      cout << "Minimum of chars   is '"  << minVector(chars) << "'"  <<endl;
   }
   catch (const out_of_range& oor) {
      cerr << "Out of Range error from inside minVector()" << endl; }
   catch ( ... ) {
      cerr << "Unknown and/or unexpected error" << endl; }

   return 0;
}


template <class T>
T minVector( vector <T> vec) {

   // if the vector is empty, this will throw an exception
   T minn = vec.at(0);

   for (int i = 0; i < (int) vec.size(); i++) {
      if (vec.at(i) < minn) {
	 minn = vec.at(i);
      }
   }
   return minn;
}

void createVectors(vector <int>  &ints, vector <string> &strs, 
		   vector <char> &chars)
{
   // add content to the string vector
   strs.push_back("yay");
   strs.push_back("extension");
   strs.push_back("dawgs");
   strs.push_back("cattes");
   strs.push_back("abcdefghijklmnopqrstuvwxyz");
   strs.push_back("aabcdefghijklmnopqrstuvwxyz");
   // if we uncomment, this will be the "minimum" string
   // strs.push_back("YELLING"); 

   // add content to the integer vector
   ints.push_back(1);
   ints.push_back(5);
   ints.push_back(7);
   ints.push_back(8);
   ints.push_back(22);
   ints.push_back(44);
   ints.push_back(45);
   ints.push_back(-9);

   // add content to the character vector
   chars.push_back('a');
   chars.push_back('b');
   chars.push_back('z');
   chars.push_back('o');
   // if we uncomment, this will be the "minimum" char
   chars.push_back('K');
   // if we uncomment, this will be the "minimum" char
   chars.push_back('!');
   // if we uncomment, this will be the "minimum" char
   chars.push_back(' ');

}