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Max and Min values from a group of numbers

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Join Date: Jan 2005

Posts: 5

Reputation: yvonnemo is an unknown quantity at this point

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yvonnemo

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Newbie Poster

Max and Min values from a group of numbers

Jan 29th, 2005

Hi, I been trying this problem for 2 days and monday 31st is the due date

I tried to use a while loop but the numbers I get are not even close. What I did on the Enter your code is the codes below the question

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//********************************************************************************************
// 
// MaxMinIntegers.cpp          
//
// Program that reads int values from a text file named "numbers01.txt"
// and writes out the largest and smallest values found. Numbers in the
// file may be separated by blanks or line breaks.
//
//********************************************************************************************

#include <fstream>
#include <iostream>
#include <cstdlib>
using namespace std;


int main() {
    // Declare input stream
    ifstream fin;
    int min, max, val;
    int isFirst = true;
    fin.open("numbers01.txt");



	// --------------------------------
	// ----- ENTER YOUR CODE HERE -----
	// --------------------------------


	// --------------------------------
	// --------- END USER CODE --------
	// --------------------------------


    fin.close();

    cout << "Largest value is " << max << ", smallest value is " << min << "\n";
}




Here is what I did
              
fin >> isFirst;
while (fin >> val)
fin >> val;
if (isFirst > val)
min = val
max = isFirst
else
max = val
min = isFirst

Last edited by alc6379; Jan 31st, 2005 at 9:16 pm.

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Join Date: Nov 2004

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jwenting

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duckman

Re: Max and Min values from a group of numbers

Jan 29th, 2005

you're going about it wrong but you probably knew that already.

Here's what to do (I leave it to you to translate that into C++):

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 C++ Syntax (Toggle Plain Text) 
declare variable for smallest value
declare variable for largest value
set both to first value in the file
while there's more data
    read new value
    if smaller than smallest set as smallest
    else when larger than largest set as largest
wend
close file
 
declare variable for smallest value
declare variable for largest value
set both to first value in the file
while there's more data
    read new value
    if smaller than smallest set as smallest
    else when larger than largest set as largest
wend
close file

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Join Date: Jan 2005

Posts: 5

Reputation: yvonnemo is an unknown quantity at this point

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yvonnemo

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Newbie Poster

Re: Max and Min values from a group of numbers

Jan 29th, 2005

Hi, thanks for helping. Here is what I tried to convert it into but it didn't quite actully work. It always make the first number it reads the max and min.. I donno why

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
//********************************************************************************************
// 
// MaxMinIntegers.cpp          
//
// Program that reads int values from a text file named "numbers01.txt"
// and writes out the largest and smallest values found. Numbers in the
// file may be separated by blanks or line breaks.
//
//********************************************************************************************
 
#include <fstream>
#include <iostream>
#include <cstdlib>
using namespace std;
 
 
int main() {
    // Declare input stream
    ifstream fin;
    int min, max, val;
    int isFirst = true;
    fin.open("numbers01.txt");
 
    fin >> isFirst;
    min = isFirst;
    max = isFirst;
 
    while (fin >> val)
    {
 
          fin >> val;
          if (val < min)
          val = min;
          else
          val = max;
    }
	// --------------------------------
	// ----- ENTER YOUR CODE HERE -----
	// --------------------------------
 
 
	// --------------------------------
	// --------- END USER CODE --------
	// --------------------------------
 
 
    fin.close();
 
    cout << "Largest value is " << max << ", smallest value is " << min << "\n";
 
    system("PAUSE");
}
//********************************************************************************************
// 
// MaxMinIntegers.cpp          
//
// Program that reads int values from a text file named "numbers01.txt"
// and writes out the largest and smallest values found. Numbers in the
// file may be separated by blanks or line breaks.
//
//********************************************************************************************

#include <fstream>
#include <iostream>
#include <cstdlib>
using namespace std;


int main() {
    // Declare input stream
    ifstream fin;
    int min, max, val;
    int isFirst = true;
    fin.open("numbers01.txt");

    fin >> isFirst;
    min = isFirst;
    max = isFirst;

    while (fin >> val)
    {

          fin >> val;
          if (val < min)
          val = min;
          else
          val = max;
    }
	// --------------------------------
	// ----- ENTER YOUR CODE HERE -----
	// --------------------------------


	// --------------------------------
	// --------- END USER CODE --------
	// --------------------------------


    fin.close();

    cout << "Largest value is " << max << ", smallest value is " << min << "\n";

    system("PAUSE");
}