One Dimensional Arrays (Highest Number)

[Barneszy]

Hey guys,

I'm new to coding and I'm stumped on this last part of the code. I need to find the Largest/Smallest number in user input on rainfall amounts.

#include <iostream>
using namespace std;

void displayMonthly(double rain[], int numElements);
void displayTotal(double rain[], int numElements);
void displayAverage(double rain[], int numElements);
void displayHigh(double rain[], int numElements);
void displayLow(double rain[], int numElements);

int main()
{
double rainfall[12] = {0.0};
int choice = 0;

//get input
for (int x = 0; x < 12; x += 1)
{
cout << "Enter the rainfall for month " << x + 1 << ": ";
cin >> rainfall[x];
}//end for

cout << endl;
cout << "--------------------------------" << endl;
cout << "1 - Display monthly amounts" << endl;
cout << "2 - Display total amount" << endl;
cout << "3 - Display average amount" << endl;
cout << "4 - Display high amount" << endl;
cout << "5 - Display low amount" << endl;
cout << "-1 - End program" << endl;
cout << "--------------------------------" << endl;
cout << "Enter your choice: ";

cin >> choice;

cout << endl;

while (choice != -1)
{
//call appropriate function or end program
switch (choice)
{
case 1:
displayMonthly(rainfall, 12);
break;
case 2:
displayTotal(rainfall, 12);
break;
case 3:
displayAverage(rainfall, 12);
break;
case 4:
displayHigh(rainfall, 12);
break;
case 5:
displayLow(rainfall, 12);
break;
default:
cout << "default" << endl;
}

cout << endl;
cout << "--------------------------------" << endl;
cout << "1 - Display monthly amounts" << endl;
cout << "2 - Display total amount" << endl;
cout << "3 - Display average amount" << endl;
cout << "4 - Display high amount" << endl;
cout << "5 - Display low amount" << endl;
cout << "-1 - End program" << endl;
cout << "--------------------------------" << endl;
cout << "Enter your choice: ";
cin >> choice;
}

system("pause");
return 0;
} // end of function

void displayMonthly(double rain[], int numElements)
{
cout << "Monthly rainfall amounts:" << endl;
for (int x = 0; x < numElements; x += 1)
cout << rain[x] << endl;
//end for

} //end of function

void displayTotal(double rain[], int numElements)
{
double total = 0.0;

for (int x = 0; x < numElements; x += 1)
total += rain[x];
//end for
cout << "Total rainfall: " << total << endl;
} //end of function

void displayAverage(double rain[], int numElements)
{
double total = 0.0;
double average = 0.0;

for (int x = 0; x < numElements; x += 1)
total += rain[x];
//end for

average = total / numElements;

cout << "Average rainfall: " << average << endl;
} //end of function

void displayHigh(double rain[], int numElements)
{


} //end of function

void displayLow(double rain[], int numElements)
{




} //end of function

[Marcos Modenesi]

You could show some code to start with, something to build upon.

[Barneszy]

I'm having trouble with the displayHigh and displayLow function definitions

[Marcos Modenesi]

There are known ways to do this with the greater effieciency, these things have a name (sorting algorithms). I'm not familiar with them, so my suggestion may not be the optimum (you shouldn't notice for such a small amount of data, but it would cost time and resources if applied to larger chunks of data, say the rainfall of the century... in 1000 different cities)

void displayHigh(const double& rain[], int numElements)
{
    // prepare a variable to store the highest rainfall 
    double maxRain = 0; 

    // go through every value
    for (int i = 0; i < numElements; i++)
     {
          // compare and check if it's higher than the previos maximum
          if (maxRain < rain [i])
          {
               // if so, replace
               maxRain = rain[i];          
          }
     }
     //display
     cout << "The highest rainfall was : " << maxRain;
} //end of function 

[atriumheart]

For the display high you could use:
void displayHigh(double rain[], int numElements)
{
double temp = 0.0;
double high;


for (int i=0; i<numElements; i++)
{
if(rain[i] > temp)
temp = rain[i];
}

high = temp;
cout << high;
}


or something of that sort... basically the same for displayLow:

void displayLow(double rain[], int numElements)
{
double temp = 1000.00;
double low;

for(int i =0; i<numElements; i++)
{
if(rain[i] < temp)
temp = rain[i];
}
low = temp;

cout << low;

[Barneszy]

Then what would I do for the lowest amount of rainfall?

Thanks btw!:)

[Barneszy]

Oops didn't see your reply atriumheart, Thank you so much guys.