/*
   testarr05.cpp
   CIS 150
   06/19/2008
   David Klick

   Demonstrations of:
      initializing an array
      displaying an array
      summing an array
      getting an average value for an array
      finding an array's minimum value
      finding an array's maximum value
*/

#include <iostream>
#include <cstdlib>
using std::cin;
using std::cout;

void cont();

int main() {
   const int ARRAY_SIZE = 10;
   int nums[ARRAY_SIZE];
   int ctr;
   int sum, min, max;
   double average;

   // seed the random number generator
   srand(time(0));
   
   // initialize the array to random numbers
   for (ctr=0; ctr<ARRAY_SIZE; ctr++) {
      // choose a number between 1 and 100
      nums[ctr] = rand() % 100 + 1;
   }
   
   // display the array on one line
   cout << "The array contains: ";
   for (ctr=0; ctr<ARRAY_SIZE; ctr++) {
      cout << nums[ctr] << " ";
   }
   cout << '\n';
      
   // add up all the array elements
   sum = 0;
   for (ctr=0; ctr<ARRAY_SIZE; ctr++) {
      sum += nums[ctr];
   }
   cout << "The sum is " << sum << '\n';

   // now the average is easy to calculate
   cout << "The average is " << (sum/(double)ARRAY_SIZE) << '\n';
   
   // find the minimum value
   min = nums[0]; // assume the first element is the smallest
   for (ctr=1; ctr<ARRAY_SIZE; ctr++) {
      // now find any that are smaller
      if (nums[ctr] < min) min = nums[ctr];
   }
   cout << "The smallest value is " << min << '\n';
   
   // find the maximum value
   max = nums[0]; // assume the first element is the largest
   for (ctr=1; ctr<ARRAY_SIZE; ctr++) {
      // now find any that are larger
      if (nums[ctr] > max) max = nums[ctr];
   }
   cout << "The largest value is " << max << '\n';
   
   cont();
   return 0;
}

/*
   void cont();
   
   Arguments: none
   
   Returns: nothing
   
   Clears input buffer and pauses waiting for user 
   to press Enter.
*/
void cont() {
   if (cin.rdbuf()->sungetc() != -1 && cin.get() != '\n') cin.ignore(80,'\n');
   cout << "Press enter to continue...";
   cin.get();
}

/*
   Sample output:
   
   The array contains: 81 20 85 96 80 93 84 69 1 40
   The sum is 649
   The average is 64.9
   The smallest value is 1
   The largest value is 96
*/