input.h

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#ifndef INPUT_LIBRARY_HEADER_INCLUDED
#define INPUT_LIBRARY_HEADER_INCLUDED

#include <iostream>
#include "arrutil.h"

template <typename ItemType>
ItemType get_bounded_both(ItemType lower, ItemType upper,
                          std::istream & read_from = std::cin,
                          const char prompt[] = "Enter value:  ",
                          bool supress = false,
                          const char errmsg[] = "Invalid -- try again!\n")
{
   ItemType value;
   if (read_from == std::cin)
   {
      std::cout << prompt;
   }
   read_from >> value;
   while ((value > upper) || (value < lower))
   {
      if (!supress)
      {
         std::cerr << "Value must be between " << lower
                   << " and " << upper << " inclusive!\n";
      }
      std::cerr << errmsg;
      if (read_from == std::cin)
      {
         std::cout << prompt;
      }
      read_from >> value;
   }
   return value;
}

template <typename ItemType>
ItemType get_bounded_upper(ItemType upper,
                           std::istream & read_from = std::cin,
                           const char prompt[] = "Enter value:  ",
                           bool supress = false,
                           const char errmsg[] = "Invalid -- try again!\n")
{
   ItemType value;
   if (read_from == std::cin)
   {
      std::cout << prompt;
   }
   read_from >> value;
   while (value > upper)
   {
      if (!supress)
      {
         std::cerr << "Value must be less than or equal to " << upper
                   << "!\n";
      }
      std::cerr << errmsg;
      if (read_from == std::cin)
      {
         std::cout << prompt;
      }
      read_from >> value;
   }
   return value;
}

template <typename ItemType>
ItemType get_bounded_lower(ItemType lower,
                           std::istream & read_from = std::cin,
                           const char prompt[] = "Enter value:  ",
                           bool supress = false,
                           const char errmsg[] = "Invalid -- try again!\n")
{
   ItemType value;
   if (read_from == std::cin)
   {
      std::cout << prompt;
   }
   read_from >> value;
   while (value < lower)
   {
      if (!supress)
      {
         std::cerr << "Value must be greater than or equal to " << lower
                   << "!\n";
      }
      std::cerr << errmsg;
      if (read_from == std::cin)
      {
         std::cout << prompt;
      }
      read_from >> value;
   }
   return value;
}

char get_in_set(const char valid[] = "YyNn",
                const char prompt[] = "Would you like to quit?  ",
                const char errmsg[] = "Invalid response!  Choose Yes or No!\n");

/*
template <typename ArrayType, typename ItemType>
int get_in_set(const ArrayType & valid, long low, long high,
               ItemType dummy,
               const char prompt[] = "Enter choice:  ",
               const char errmsg[] = "Invalid response!\n")
{
   long i;
   cout << prompt;
   cin >> dummy;
   i = find_if<ArrayType,ItemType,ItemType>
               (valid, low, high, valid[low], dummy,
                isEqualTo<ItemType,ItemType>);
   while (i < low)
   {
      cout << errmsg << prompt;
      cin >> dummy;
      i = find_if<ArrayType,ItemType,ItemType>
                  (valid, low, high, valid[low], dummy,
                   isEqualTo<ItemType,ItemType>);
   }
   return i;
}
*/

#endif

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