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Dec 2nd, 2006

Homework Help.

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Hi everyone and thanks for looking to help me. I am working with a program involving arrays. I needed to write one that involves the use to
have the program take
about 10 numbers, list the minimum, the maximum, and the average.
Now the program that I have below runs fine which finds the average. But when I try to loop the program to find the minimum and maximum numbers it just repeats.
How do I loop in a loop to find the minimum and maximum nubers.
Please let me know. TY

cpp Syntax (Toggle Plain Text)
#include 
using namespace std;
 
 
const int arraymax = 10;    
 
typedef int arraytype[arraymax];
 
 
 
float findaverage(arraytype numarray, int count);
 
void array2(arraytype numarray, int & count);
 
 
int main(void)
   {
   int array1;
   arraytype array3;
   float avg;
 
   array2(array3, array1);
   avg = findaverage(array3, array1);
   cout << endl << "The average is: " << avg << endl << endl;
 
   return 0;
   }
 
 
void array2(arraytype numarray, int & count)
   {
   int k;
 
   cout << "How many numbers would you like to enter? ";
   cin >> count;
 
   for (k = 0; k < count; k++)
      {
      cout << "Enter your numbers " << k << " ";
      cin >> numarray[k];
      }
   }
 
 
float findaverage(arraytype numarray, int count)
   {
   int k;
   float sum;
 
   sum = 0.0;
   for (k = 0; k < count; k++)
      sum=sum + numarray[k];
 
   if (count > 0)
      return sum / count;
   else
      return 0.0;
   }
#include 
using namespace std;


const int arraymax = 10;    

typedef int arraytype[arraymax];

 

float findaverage(arraytype numarray, int count);

void array2(arraytype numarray, int & count);


int main(void)
   {
   int array1;
   arraytype array3;
   float avg;

   array2(array3, array1);
   avg = findaverage(array3, array1);
   cout << endl << "The average is: " << avg << endl << endl;

   return 0;
   }

 
void array2(arraytype numarray, int & count)
   {
   int k;

   cout << "How many numbers would you like to enter? ";
   cin >> count;

   for (k = 0; k < count; k++)
      {
      cout << "Enter your numbers " << k << " ";
      cin >> numarray[k];
      }
   }

 
float findaverage(arraytype numarray, int count)
   {
   int k;
   float sum;

   sum = 0.0;
   for (k = 0; k < count; k++)
      sum=sum + numarray[k];

   if (count > 0)
      return sum / count;
   else
      return 0.0;
   }

Last edited by WaltP; Dec 3rd, 2006 at 12:27 am. Reason: Please use code tags. Read the Announcement about BBCodes

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jessiegirl

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Dec 2nd, 2006

Re: Homework Help.

Ah this is what you must do.

1. Write a flow chart first.
2. Try to do this without functions they will only confuse you.

iamthwee

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Dec 2nd, 2006

Re: Homework Help.

>>How do I loop in a loop to find the minimum and maximum nubers

Let the first element be the largest (or smallest) element in the array. If the array only has one element then that must be true. If the array has more than one element it may or may not be true so look at each element in the array after the first element. If that element is larger/smaller than the current largest/smallest, then let the current element be the largest/smallest. At the end of the loop the current largest/smallest is the answer.

Lerner

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Dec 2nd, 2006

Re: Homework Help.

Click to Expand / Collapse Quote originally posted by Lerner ...

>>How do I loop in a loop to find the minimum and maximum nubers

Let the first element be the largest (or smallest) element in the array. If the array only has one element then that must be true. If the array has more than one element it may or may not be true so look at each element in the array after the first element. If that element is larger/smaller than the current largest/smallest, then let the current element be the largest/smallest. At the end of the loop the current largest/smallest is the answer.

Okay with hours of work I came up with this.

cpp Syntax (Toggle Plain Text)
//Jessica Moore
#include <iostream>
using namespace std;
 
void getStats( double * min, 
               double * max,
               double * average,
               int numsNum );
 
int main()
{
    double min, max, average;
    int nums;
    do ;
    {
        cout << "How many Number will you Enter? " << flush;
        cin >> nums;
    }
 {
  while (nums <0);
 
 
 
    getStats( &min, &max, &average, nums );                      
    cout <<"The Minimum is: " << min << endl
         <<"The Maximum is: " << max <<endl
         <<"The Average is: " << average <<endl;                                                               
 
    return 0;
}
void getStats( double * min, double * max, double * average, int numsNum )
{
int *myArray=new int[numsNum];
int minimum = myArray[0];
int maximum = myArray[0];
int sum = 0;
for (int i = 0; i < numsNum; i++)
{
                cout << "Enter you number[" << i << "]: ";
              cin >> myArray[numsNum];
for (int i = 0; i < numsNum; i++)
    if (myArray[numsNum] < minimum)
{
                    minimum = myArray[numsNum];       
                    *min = minimum;
 
for (int i =0; i < numsNum; i++)
    if (myArray[numsNum] > minimum)
{        
              maximum = myArray[numsNum];
              *max = maximum;
for (int i = 0; i < numsNum; i++) 
{
     sum = ((sum + myArray[numsNum])/numsNum);   
     *average = sum;  
}
} 
}
}
} 
 
}
//Jessica Moore
#include <iostream>
using namespace std;
 
void getStats( double * min, 
               double * max,
               double * average,
               int numsNum );
               
int main()
{
    double min, max, average;
    int nums;
    do ;
    {
        cout << "How many Number will you Enter? " << flush;
        cin >> nums;
    }
 {
  while (nums <0);
                                                                                
                                                                           
                                                                               
    getStats( &min, &max, &average, nums );                      
    cout <<"The Minimum is: " << min << endl
         <<"The Maximum is: " << max <<endl
         <<"The Average is: " << average <<endl;                                                               

    return 0;
}
void getStats( double * min, double * max, double * average, int numsNum )
{
int *myArray=new int[numsNum];
int minimum = myArray[0];
int maximum = myArray[0];
int sum = 0;
for (int i = 0; i < numsNum; i++)
{
                cout << "Enter you number[" << i << "]: ";
              cin >> myArray[numsNum];
for (int i = 0; i < numsNum; i++)
    if (myArray[numsNum] < minimum)
{
                    minimum = myArray[numsNum];       
                    *min = minimum;
              
for (int i =0; i < numsNum; i++)
    if (myArray[numsNum] > minimum)
{        
              maximum = myArray[numsNum];
              *max = maximum;
for (int i = 0; i < numsNum; i++) 
{
     sum = ((sum + myArray[numsNum])/numsNum);   
     *average = sum;  
}
} 
}
}
} 
 
}

I still have some errors and I can't seem to figure out the mistakes TY for all your help

Last edited by WaltP; Dec 3rd, 2006 at 12:28 am. Reason: Please use BB Code and Inlinecode tags

jessiegirl

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Dec 2nd, 2006

Re: Homework Help.

>I still have some errors and I can't seem to figure out the mistakes TY for all your help
I refuse to read your code until you format it and put it in code tags.

Narue

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Dec 3rd, 2006

Re: Homework Help.

Click to Expand / Collapse Quote originally posted by Narue ...

>I still have some errors and I can't seem to figure out the mistakes TY for all your help
I refuse to read your code until you format it and put it in code tags.

And don't let us try to figure out what the errors are. Tell us. It's not our program.

WaltP

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Dec 3rd, 2006

Re: Homework Help.

(Toggle Plain Text)

    do ;
    {
        cout << "How many Number will you Enter? " << flush;
        cin >> nums;
    }
{
  while (nums <0);

Your loop is really screwed up. I don't think you want that semicolon after do, and that opening brace before the while statement. Here's how do...while statements are supposed to look like:

c Syntax (Toggle Plain Text)
do {
// do stuff here
 
} while (expression == true);
do {
// do stuff here

} while (expression == true);

And by the way you've got 1 too many closing braces at the end of your program. Proper indentation would help you to see problems like that.

John A

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Dec 3rd, 2006

Re: Homework Help.

Here's what I think is a correct version of your function. Look at this version versus yours. Identify differences and explain why this version is more likely to work than yours. Adapt this version to your needs if need be. Note: I haven't compiled this version, so there may still be some errors.

I always use reference variables in preference to pointer variables if possible because the syntax is so much easier.

C++ Syntax (Toggle Plain Text)
void getStats( double & min, double & max, double & average, int numsNum )
{
  int * myArray=new int[numsNum];
  int sum;
 
  for (int i = 0; i < numsNum; i++)
  {
     cout << "Enter you number[" << i << "]: ";
     cin >> myArray[i];
  }
 
  //set min to be first element entered in myArray
  min = myArray[0];
 
  //for each element in myArray after first element
  for (int i = 1; i < numsNum; i++)
 {
    if (myArray[i] < min)
        min = myArray[i];    
 }   
 
 //set max to be first element of myArray
 max = myArray[0];
 
 //look at all elements in myArray after first element            
 for (int i = 1; i < numsNum; i++)
 {
    if (myArray[i] > max)        
       max = myArray[i];
 }
 
 //set sum to zero
 sum = 0;
 for (int i = 0; i < numsNum; i++) 
 {
     //add each value of myArray to sum;
     sum = sum + myArray[i];
 }
 
 //now calculate average
 average = sum/numsNum;
 
 delete [] myArr;
}
void getStats( double & min, double & max, double & average, int numsNum )
{
  int * myArray=new int[numsNum];
  int sum;

  for (int i = 0; i < numsNum; i++)
  {
     cout << "Enter you number[" << i << "]: ";
     cin >> myArray[i];
  }

  //set min to be first element entered in myArray
  min = myArray[0];

  //for each element in myArray after first element
  for (int i = 1; i < numsNum; i++)
 {
    if (myArray[i] < min)
        min = myArray[i];    
 }   
                    
 //set max to be first element of myArray
 max = myArray[0];

 //look at all elements in myArray after first element            
 for (int i = 1; i < numsNum; i++)
 {
    if (myArray[i] > max)        
       max = myArray[i];
 }

 //set sum to zero
 sum = 0;
 for (int i = 0; i < numsNum; i++) 
 {
     //add each value of myArray to sum;
     sum = sum + myArray[i];
 }

 //now calculate average
 average = sum/numsNum;

 delete [] myArr;
}

Lerner

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Dec 3rd, 2006

Re: Homework Help.

pretty good if you compiled that in your head.

Last edited by iamthwee; Dec 3rd, 2006 at 3:26 pm.

iamthwee

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Re: Homework Help.

Click to Expand / Collapse Quote originally posted by Lerner ...

Here's what I think is a correct version of your function. Look at this version versus yours.

I disagree on principal. She already has a function called findeaverage() so why would you want to make a do-all function? They are harder to debug and maintain. Take each piece you want to accomplish and make a function out of it. Return one value from each with the return statement.

And change the name of array1. It's not an array. Call it cout.

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