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Using array value in a function

Zenith1900 (26)
Hello,
I would like to pass an array number into a function. I get an error saying i was not declared. Please explain why what im doing is wrong. Thank you!
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/*This program will read in up to 1000 
  positive numbers, average them, and
  find the maximum and min minimum 
*/ 

#include <cstdlib>
#include <fstream>
#include <iostream>

using namespace std;

double average (int , double []),
       minimum  (double []),
       maximum  (double []),
       avg, min, max;
       

int main()
{
	double darr[1000], 
	       avg,min,max;
	       
    int inputNum;
	ifstream inputFile;
    inputFile.open ("numbers.txt");
  if (inputFile)
{
	cout << "Please enter positive double values"
	     << "How many values would you like to read in?";
	cin >> inputNum;
  if ( inputNum > 0 && inputNum < 1001)
  {
    for (int i = 0; i < inputNum; i++)
	inputFile >> darr[i];
	    avg	= average (inputNum, darr);
	cout << "The average number is " << avg << endl;
    
		min = minimum (darr);
	cout << "The smallest number is " << min << endl;
	   
	    max = maximum (darr);
	cout << "The largest number is " << max << endl;
  }
	
}

    else
 {
 // Display an error message.
 cout << "Error opening the file.\n";
 }
 inputFile.close();
  return 0;
}
	
	 double average (int num, double arr[])
     {
     	double sum = 0.0;
            for(int i = 0; i < num; i++ )
            sum = sum + arr[i];
        return sum/num;
      }
   double minimum (double arr[])
     {
     
         double smallest = 0.0; 
         if (arr[i] <= smallest)
         smallest = arr[i];
         return smallest;
     }
   
    double maximum (double arr[i])
    {
    	double largest = 0.0;
    	if (largest <= arr[i])
    	largest = arr[i];
    	return largest; 
    }
LendraDwi (311)
There double maximum (double arr[i])
Edit: ups, and you haven't declare varable i inside Minimum and Maximum function
And I thnk you'll also need to pass var inputNum to Maximum and Minimum function as well and change both of this function to
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for(int i=0;i<inputNum;i++){
  if(largest < or > arr[i])
  largest=arr[i]
}
Last edited on
Zenith1900 (26)
yeah but i still get an error saying that i was not declared in a scope
LendraDwi (311)
Have you remove i in doublemaximum parameters
Zenith1900 (26)
i replied before you edited, everything works thanks! One more question, when i run the program the second time it seems that the numbers that were used the first time are deleted from the file, is there anything i can use to keep the file constant so that the same # of doubles is there every time i run the program?
LendraDwi (311)
Did you mean that inputNum doesn't need to inputted again after the program runs for the first time ?
Zenith1900 (26)
Lets say that the numbers in a file are
30
11
23
56
45
43
and the first time the user types in 3 and 30, 11 and 23 get used. After this run the file looks like this;
56
45
43
My question is how do i keep it original, with all the numbers that were there in the beginning, after numerous runs?
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