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  1. //Maxwell Brewer                 CS1A                     Chapter 8, p. 488,  #5
  2. //
  3. /*******************************************************************************
  4.  * RAINFALL STATISTICS MODIFICATION
  5.  * _____________________________________________________________________________
  6.  * This program collects monthly rainfall data, calculates total and average 
  7.  * rainfall, identifies the months with the highest and lowest rainfall, 
  8.  * and sorts the months by rainfall amount.
  9.  * _____________________________________________________________________________
  10.  * INPUT
  11.  *   Rainfall data for each month.
  12.  * 
  13.  * OUTPUT
  14.  *   Total rainfall, average monthly rainfall, highest and lowest rainfall months,
  15.  *   and sorted rainfall data in descending order.
  16.  *******************************************************************************/
  17.  
  18. #include <iostream>
  19. using namespace std;
  20.  
  21. const unsigned MONTHS = 12;
  22.  
  23. void sortMonths(unsigned[], double[], const unsigned);
  24. void calculateStatistics(const double[], unsigned&, unsigned&, double&, double&);
  25.  
  26. int main() {
  27.     double rainfall[MONTHS];
  28.     unsigned month[MONTHS];
  29.  
  30.     // Collect rainfall data with input validation
  31.     for(unsigned i = 0; i < MONTHS; i++) {
  32.         cout << "\nEnter the total rainfall for month [" << (i + 1) << "]: ";
  33.         cin >> rainfall[i];
  34.  
  35.         while (rainfall[i] < 0) {  // Validate input for non-negative values
  36.             cout << "The value should not be negative. Please enter again: ";
  37.             cin >> rainfall[i];
  38.         }
  39.  
  40.         month[i] = i + 1;  // Store the month number
  41.     }
  42.  
  43.     // Calculate statistics
  44.     unsigned highestMonth, lowestMonth;
  45.     double totalRainfall, averageRainfall;
  46.  
  47.     calculateStatistics(rainfall, highestMonth, lowestMonth, totalRainfall, averageRainfall);
  48.  
  49.     // Display statistics
  50.     cout << "\n\nRainfall statistics for the year:\n";
  51.     cout << "   Total rainfall: " << totalRainfall << " units\n";
  52.     cout << "Average monthly rainfall: " << averageRainfall << " units\n";
  53.     cout << "Month with highest rainfall: " << (highestMonth + 1) << "\n";
  54.     cout << "Month with lowest rainfall: " << (lowestMonth + 1) << "\n";
  55.  
  56.     // Sort and display rainfall data by descending order
  57.     sortMonths(month, rainfall, MONTHS);
  58.     cout << "\nSorted rainfall data (highest to lowest):\n";
  59.     for(unsigned i = 0; i < MONTHS; i++) {
  60.         cout << "Month [" << month[i] << "] - Rainfall: " << rainfall[i] << " units\n";
  61.     }
  62.  
  63.     return 0;
  64. }
  65.  
  66. void calculateStatistics(const double rainfall[], unsigned& highestMonth, unsigned& lowestMonth, double& totalRainfall, double& averageRainfall) {
  67.     totalRainfall = 0.0;
  68.     highestMonth = lowestMonth = 0;
  69.  
  70.     for(unsigned i = 0; i < MONTHS; i++) {
  71.         totalRainfall += rainfall[i];
  72.  
  73.         if (rainfall[i] > rainfall[highestMonth]) {
  74.             highestMonth = i;
  75.         }
  76.  
  77.         if (rainfall[i] < rainfall[lowestMonth]) {
  78.             lowestMonth = i;
  79.         }
  80.     }
  81.  
  82.     averageRainfall = totalRainfall / MONTHS;
  83. }
  84.  
  85. void sortMonths(unsigned months[], double rainfall[], const unsigned SIZE) {
  86.     // Selection sort to sort rainfall and corresponding months in descending order
  87.     for(unsigned i = 0; i < SIZE - 1; i++) {
  88.         unsigned largest = i;
  89.  
  90.         for(unsigned j = i + 1; j < SIZE; j++) {
  91.             if (rainfall[j] > rainfall[largest]) {
  92.                 largest = j;
  93.             }
  94.         }
  95.  
  96.         // Swap rainfall values
  97.         double tempRain = rainfall[largest];
  98.         rainfall[largest] = rainfall[i];
  99.         rainfall[i] = tempRain;
  100.  
  101.         // Swap month numbers accordingly
  102.         unsigned tempMonth = months[largest];
  103.         months[largest] = months[i];
  104.         months[i] = tempMonth;
  105.     }
  106. }
Success #stdin #stdout 0s 5280KB
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Standard input is empty
stdout
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Enter the total rainfall for month [1]: 
Enter the total rainfall for month [2]: 
Enter the total rainfall for month [3]: 
Enter the total rainfall for month [4]: 
Enter the total rainfall for month [5]: 
Enter the total rainfall for month [6]: 
Enter the total rainfall for month [7]: 
Enter the total rainfall for month [8]: 
Enter the total rainfall for month [9]: 
Enter the total rainfall for month [10]: 
Enter the total rainfall for month [11]: 
Enter the total rainfall for month [12]: 

Rainfall statistics for the year:
   Total rainfall: 1.71853e-309 units
Average monthly rainfall: 1.43211e-310 units
Month with highest rainfall: 10
Month with lowest rainfall: 11

Sorted rainfall data (highest to lowest):
Month [10] - Rainfall: 4.68616e-310 units
Month [9] - Rainfall: 4.68616e-310 units
Month [3] - Rainfall: 1.11614e-310 units
Month [1] - Rainfall: 1.11614e-310 units
Month [2] - Rainfall: 1.11614e-310 units
Month [7] - Rainfall: 1.11614e-310 units
Month [4] - Rainfall: 1.11614e-310 units
Month [6] - Rainfall: 1.11614e-310 units
Month [8] - Rainfall: 1.11614e-310 units
Month [5] - Rainfall: 3.59201e-319 units
Month [12] - Rainfall: 9.88131e-324 units
Month [11] - Rainfall: 4.94066e-324 units
https://ideone.com/wcPCLd
Chapter 8, p. 488, #5
language:
C++ (gcc 8.3)
created:
5 days ago
visibility:
public

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