Rewrite lab assignment 7 using pointer to allocate the array memory. #include<io

Question

Rewrite lab assignment 7 using pointer to allocate the array memory.

#include<iostream>

#include<fstream>

#include<iomanip>

using namespace std;

//Intiate Functions

int calculateAverageRainFall(int rainFall [], int size)

{

int sum=0;

for(int month=0; month

sum+=rainFall[month];

return sum/size;

}

void inputRainFall(int rainFall[], int size)

{

//Open the file

ifstream inputFile;

inputFile.open("rainfall.txt");

//Initialize month counter

int month = 0;

//Read the monthly rainfall in the file

for(month=0; month

inputFile >> rainFall[month];

}

void classifyAndDisplayRainfall(int rainFall[], int months)

{

//Start to List Month & Store in String

string monthNames[] = {"January","Febuary","March","April","May",

"June","July","August","September","October","November","December"};

int avgRainFall=calculateAverageRainFall(rainFall,months);

int highestRainFall,lowestRainFall;

int highestRainFallIndex,lowestRainFallIndex;

highestRainFall=lowestRainFall=rainFall[0];

highestRainFallIndex=lowestRainFallIndex=0;

//Formatted Output Columns

cout<<" Month Rainfall(mm) Classification ";

cout<<"------- ------------ ------------------ ";

//Start For-Loop

for(int month=0; month

{

cout<<(month+1)<<" "<

if((avgRainFall+(avgRainFall*0.2))<=rainFall[month])

cout<<"Rainy ";

else if(avgRainFall>rainFall[month]+(avgRainFall*0.25))

cout<<"Dry ";

else

cout<<"Average ";

if(highestRainFall

{

highestRainFall=rainFall[month];

highestRainFallIndex=month;

}

if(lowestRainFall>rainFall[month])

{

lowestRainFall=rainFall[month];

lowestRainFallIndex=month;

}

}//End For-Loop

///Output Information Back to User

cout<<" The year's average monthly rainfall was "<

cout<

cout<

}

//Start Main

int main()

{

int rainFall[12];

int size=12;

inputRainFall(rainFall,size);

classifyAndDisplayRainfall(rainFall,size);

return 0;

}//End Main

Explanation / Answer

#include<iostream>
#include<fstream>
#include<iomanip>

using namespace std;

//Intiate Functions
int calculateAverageRainFall(int *rainFall, int size)
{
   int sum=0;
   for(int month=0; month<size; ++month)
       sum+=rainFall[month];
   return sum/size;
}

void inputRainFall(int *rainFall, int size)
{
   //Open the file
   ifstream inputFile;
   inputFile.open("rainfall.txt");

   //Initialize month counter
   int month = 0;

   //Read the monthly rainfall in the file
   for(month=0; month<size; ++month)
       inputFile >> rainFall[month];

}

// this is how you pass around array pointers
void classifyAndDisplayRainfall(int *rainFall, int months)

{

   //Start to List Month & Store in String
   string monthNames[] = {"January","Febuary","March","April","May", "June","July","August","September","October","November","December"};

   int avgRainFall=calculateAverageRainFall(rainFall,months);
   int highestRainFall,lowestRainFall;
   int highestRainFallIndex,lowestRainFallIndex;
   highestRainFall=lowestRainFall=rainFall[0];
   highestRainFallIndex=lowestRainFallIndex=0;

   //Formatted Output Columns
   cout<<" Month Rainfall(mm) Classification ";
   cout<<"------- ------------ ------------------ ";
   //Start For-Loop
  
   for(int month=0; month<months; ++month)
   {
       // uncomment this once you have fixed the below cout statement
       //cout<<(month+1)<<" "<
           if((avgRainFall+(avgRainFall*0.2))<=rainFall[month])
               cout<<"Rainy ";
           else if(avgRainFall>rainFall[month]+(avgRainFall*0.25))
               cout<<"Dry ";
           else
               cout<<"Average ";
           if(highestRainFall<rainFall[month])
           {
               highestRainFall=rainFall[month];
               highestRainFallIndex=month;
           }

           if(lowestRainFall>rainFall[month])
           {
               lowestRainFall=rainFall[month];
               lowestRainFallIndex=month;
           }

   }//End For-Loop

   // uncomment this once you have fixed the below cout statement
   /*
   ///Output Information Back to User
   cout<<" The year's average monthly rainfall was "<
       cout<
       cout<
       */
}

//Start Main
int main()
{
   // this is how you initialize an int array with pointers
   int *rainFall = new int[12];
   int size=12;

   inputRainFall(rainFall,size);
   classifyAndDisplayRainfall(rainFall,size);
   return 0;
}//End Main

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