Question

Problem: A local amateur meteorologist has been recording daily high temperatures throughout the month of June. He would like you to write a program to compute some statistics based on the data he has collected. He has placed each daily high temperature on a separate line in a file named “summer_temps.txt”. The high temperatures are in order so that the first one is for June 1, the second is for June 2, and so on. The statistics that the meteorologist would like for you to compute in your program are:

The average daily high temperature for the entire month.

The number of days over 100 for the month.

The maximum temperature for the month and on what day it occurred.

Input: All of the input will come from a file named “summerTemps.txt”. The temperatures may have fractional parts, like 99.87. Your program should also test for file open errors.

Processing: The data must be stored in an array. Compute the statistics requested above. Use a function for each task as well as a function to read in the data (we will write that in class).

Output: Display the statistics to the screen, labelled, and with the temperatures formatted to 1 decimal place.

Sample output:

Average daily high temperature: 92.6
Number of days over 100 : 4
Maximum temperature: 102.2 (occurred on June 20)

/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/

You will have at least four functions and an array

use C++ coding

codeBlack program

Answer 1

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

double average(double arr[], int size){
   double total = 0;
   for(int i = 0; i < size; ++i){
       total += arr[i];
   }
   return total / size;
}

int numDaysOver(double arr[], int size, int val){
   int count = 0;
   for(int i = 0; i < size; ++i){
       if(arr[i] > val)
           ++count;
   }
   return count;
}

int getMaxInd(double arr[], int size){
   int maxInd = 0;
   for(int i = 1; i < size; ++i){
       if(arr[i] > arr[maxInd]){
           maxInd = i;
       }
   }
   return maxInd;
}

int readData(string fileName, double arr[]){
   ifstream in(fileName.c_str());
   if(in.is_open()){
       double val;
       int i = 0;
       while(in >> val){
           arr[i++] = val;
       }
       return i;
       in.close();
   }
   else{
       cout << "can not open " << fileName << " to read" << endl;
       return 0;
   }
}

int main(){
   double arr[1000];
   int size = 0;
   size = readData("summerTemps.txt", arr);
   cout << "Average daily high temperature: " << average(arr, size) << endl;
   cout << "Number of days over 100 : " << numDaysOver(arr, size, 100) << endl;
   int ind = getMaxInd(arr, size);
   cout << "Maximum temperature: " << arr[ind] << " (occurred on June " << (ind + 1) << ")" << endl;
   return 0;
}

$\color{blue}\underline{summerTemps.txt\;I\;used:}$

93.5
94.6
97.9
92.5
92.7
94.4
100.2
101.4
99.6
98.4

C:Windows system321cmd.exe Average daily high temperature: 96.52 Number of days over 100 : 2 Maximum temperature: 101.4 〈occurred on June 8〉 Press any key to continue . . .