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finding the max and min values in an array

 
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finding the max and min values in an array
paintballfreak72
14 Mar, 2008 - 07:35 AM
Post #1

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Posts: 16
hi, i have been trying to figure out this problem for about 3 days now, with no luck.
the issue is that i need to find the max value and min value in an array called "rainfall" and display the values along side the month.

heres what i have so far.

CODE
#include <windows.h>
#include <iostream>
#include <process.h>
#include <iomanip>
#include <conio.h>
#include <string>
#include <stdio.h>
#include <ctype.h>
using namespace std;

void gotoxy(int x, int y)
{
  COORD coord;
  coord.X = x;
  coord.Y = y;
  SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
}

void clrscr(int x, int y)
{
    COORD                       coordScreen = { x, y };
    DWORD                       cCharsWritten;
    CONSOLE_SCREEN_BUFFER_INFO  csbi;
    DWORD                       dwConSize;
    HANDLE                      hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
    GetConsoleScreenBufferInfo(hConsole, &csbi);
    dwConSize = csbi.dwSize.X * csbi.dwSize.Y;
    FillConsoleOutputCharacter(hConsole, TEXT(' '),
                               dwConSize, coordScreen, &cCharsWritten);
    GetConsoleScreenBufferInfo(hConsole, &csbi);
    FillConsoleOutputAttribute(hConsole, csbi.wAttributes,
                               dwConSize, coordScreen, &cCharsWritten);
    SetConsoleCursorPosition(hConsole, coordScreen);
}

    void main(void)

{
    string month[12] = {"January", "Febuary", "March", "April",
        "May", "June", "July", "August", "September", "October",
        "November", "December"};
    float rainfall[12];
    float avg = 0.00;
    float sum = 0.00;
    int i;
    int y = 5;
    int x = i + 1;
    
    gotoxy(10,4);
    cout << "Month" << endl;

    gotoxy(20,4);
    cout << "Rainfall" << endl;

    for(i = 0; i < 12; i++)
    {
        y++;
        gotoxy(10,y);
        cout << month[i] << endl;

        gotoxy(20,y);
        cin >> rainfall[i];
    }

    for(i = 0; i < 12; i++)
    {
        sum = sum + rainfall[i];
    }

    avg = sum/12;

    /*  im not sure what code id need here to find the highest and lowest values

for(i = 0; i < 12; i++)
    {
        if(rainfall[i] > rainfall[x]);
    }

*/

    gotoxy(10,20);
    cout << "Average rainfall for 12 months is " << avg << "mm" << endl;
    gotoxy(10,21);
    
/*this is where i need to display the values and according months


cout << "The month with the highest rainfall is " << month[i] << " at " << rainfall[i] << "mm." << endl;
    gotoxy(10,22);
    cout << "The month with the lowest rainfall is " << month[i] << " at " << rainfall[i] << "mm." << endl;

*/

    _getch();
    }





thanks for any help/input here guys/girls.
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Amadeus
RE: Finding The Max And Min Values In An Array
14 Mar, 2008 - 07:42 AM
Post #2

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What's the problem? Are you getting a compiler error? unexpected output?
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paintballfreak72
RE: Finding The Max And Min Values In An Array
14 Mar, 2008 - 07:53 AM
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Posts: 16
QUOTE(Amadeus @ 14 Mar, 2008 - 08:42 AM) *

What's the problem? Are you getting a compiler error? unexpected output?



well at this point it builds and compiles fine, i need to figure out what the max and min values of "rainfall[]" and display it along with the month it corresponds to.
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Stepler
RE: Finding The Max And Min Values In An Array
14 Mar, 2008 - 08:13 AM
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Function of search of the maximal number in a array:
CODE

float max_arr(float *a,int n)
{
float m;
m=*a;
for(short i=1;i<n;i+=1)
if(m<*(a+i)) m=*(a+i);
return m;
}

Function of search of the minimal number in a array
CODE

float min_arr(float *a,int n)
{
float m;
m=*a;
for(short i=1;i<n;i+=1)
if(m>*(a+i)) m=*(a+i);
return m;
}


Parameters of function are the pointer on a array and quantity of numbers in a array.
Function returns accordingly the maximal (minimal) value in array.
You only need to insert it into your code!

This post has been edited by Stepler: 14 Mar, 2008 - 08:14 AM
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paintballfreak72
RE: Finding The Max And Min Values In An Array
14 Mar, 2008 - 08:34 AM
Post #5

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Joined: 14 Mar, 2008
Posts: 16
QUOTE(Stepler @ 14 Mar, 2008 - 09:13 AM) *

Function of search of the maximal number in a array:
CODE

float max_arr(float *a,int n)
{
float m;
m=*a;
for(short i=1;i<n;i+=1)
if(m<*(a+i)) m=*(a+i);
return m;
}

Function of search of the minimal number in a array
CODE

float min_arr(float *a,int n)
{
float m;
m=*a;
for(short i=1;i<n;i+=1)
if(m>*(a+i)) m=*(a+i);
return m;
}


Parameters of function are the pointer on a array and quantity of numbers in a array.
Function returns accordingly the maximal (minimal) value in array.
You only need to insert it into your code!




thanks,

but its not working right, i get lots of errors

l:\assignments & notes\rainfall arrays\rainfall arrays\rainfall arrays.cpp(73) : error C2601: 'max_arr' : local function definitions are illegal
l:\assignments & notes\rainfall arrays\rainfall arrays\rainfall arrays.cpp(38): this line contains a '{' which has not yet been matched
l:\assignments & notes\rainfall arrays\rainfall arrays\rainfall arrays.cpp(84) : error C2601: 'min_arr' : local function definitions are illegal
l:\assignments & notes\rainfall arrays\rainfall arrays\rainfall arrays.cpp(38): this line contains a '{' which has not yet been matched
l:\assignments & notes\rainfall arrays\rainfall arrays\rainfall arrays.cpp(98) : error C2065: 'm' : undeclared identifier
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Stepler
RE: Finding The Max And Min Values In An Array
14 Mar, 2008 - 11:29 AM
Post #6

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Errors should not be, functions work truly!
I have inserted these functions into your code, all works look!
CODE

#include <windows.h>
#include <iostream>
#include <process.h>
#include <iomanip>
#include <conio.h>
#include <string>
#include <stdio.h>
#include <ctype.h>
using namespace std;
void gotoxy(int x, int y)
{
  COORD coord;
  coord.X = x;
  coord.Y = y;
  SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
}

void clrscr(int x, int y)
{
    COORD                       coordScreen = { x, y };
    DWORD                       cCharsWritten;
    CONSOLE_SCREEN_BUFFER_INFO  csbi;
    DWORD                       dwConSize;
    HANDLE                      hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
    GetConsoleScreenBufferInfo(hConsole, &csbi);
    dwConSize = csbi.dwSize.X * csbi.dwSize.Y;
    FillConsoleOutputCharacter(hConsole, TEXT(' '),
                               dwConSize, coordScreen, &cCharsWritten);
    GetConsoleScreenBufferInfo(hConsole, &csbi);
    FillConsoleOutputAttribute(hConsole, csbi.wAttributes,
                               dwConSize, coordScreen, &cCharsWritten);
    SetConsoleCursorPosition(hConsole, coordScreen);
}
float min_arr(float*,int);
float max_arr(float*,int);

    void main(void)

{
    string month[12] = {"January", "Febuary", "March", "April",
        "May", "June", "July", "August", "September", "October",
        "November", "December"};
    float rainfall[12];
    float avg = 0.00;
    float sum = 0.00;
    int i;
    int y = 5;
    int x = i + 1;
    
    gotoxy(10,4);
    cout << "Month" << endl;

    gotoxy(20,4);
    cout << "Rainfall" << endl;

    for(i = 0; i < 12; i++)
    {
        y++;
        gotoxy(10,y);
        cout << month[i] << endl;

        gotoxy(20,y);
        cin >> rainfall[i];
    }

    for(i = 0; i < 12; i++)
    {
        sum = sum + rainfall[i];
    }

    avg = sum/12;

    /*  im not sure what code id need here to find the highest and lowest values

for(i = 0; i < 12; i++)
    {
        if(rainfall[i] > rainfall[x]);
    }

*/

    gotoxy(10,20);
    cout << "Average rainfall for 12 months is " << avg << "mm" << endl;
    gotoxy(10,21);
    cout<<"max="<<max_arr(rainfall,12)<<endl;
    gotoxy(10,24);
    cout<<"min="<<min_arr(rainfall,12)<<endl;
/*this is where i need to display the values and according months


cout << "The month with the highest rainfall is " << month[i] << " at " << rainfall[i] << "mm." << endl;
    gotoxy(10,22);
    cout << "The month with the lowest rainfall is " << month[i] << " at " << rainfall[i] << "mm." << endl;

*/

    _getch();
    }
float max_arr(float *a,int n)
{
float m;
m=*a;
for(short i=1;i<n;i+=1)
if(m<*(a+i)) m=*(a+i);
return m;
}
float min_arr(float *a,int n)
{
float m;
m=*a;
for(short i=1;i<n;i+=1)
if(m>*(a+i)) m=*(a+i);
return m;
}
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paintballfreak72
RE: Finding The Max And Min Values In An Array
15 Mar, 2008 - 08:45 AM
Post #7

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Joined: 14 Mar, 2008
Posts: 16
what does this part do

cout<<"max="<<max_arr(rainfall,12)<<endl;
gotoxy(10,24);
cout<<"min="<<min_arr(rainfall,12)<<endl;

i mean the "min_arr(rainfall,12)"


thanks for the help biggrin.gif
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paintballfreak72
RE: Finding The Max And Min Values In An Array
15 Mar, 2008 - 08:11 PM
Post #8

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Posts: 16
k so it works now, thanks stepler. but i still need to display the month for the highest and lowest months...im gunna work on it tonite and ill post back if i get anywhere
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Stepler
RE: Finding The Max And Min Values In An Array
16 Mar, 2008 - 06:10 AM
Post #9

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My Contributions
I modified functions, now there is that it was needed!
CODE

#include <windows.h>
#include <iostream>
#include <process.h>
#include <iomanip>
#include <conio.h>
#include <string>
#include <stdio.h>
#include <ctype.h>
using namespace std;
void gotoxy(int x, int y)
{
  COORD coord;
  coord.X = x;
  coord.Y = y;
  SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
}

void clrscr(int x, int y)
{
    COORD                       coordScreen = { x, y };
    DWORD                       cCharsWritten;
    CONSOLE_SCREEN_BUFFER_INFO  csbi;
    DWORD                       dwConSize;
    HANDLE                      hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
    GetConsoleScreenBufferInfo(hConsole, &csbi);
    dwConSize = csbi.dwSize.X * csbi.dwSize.Y;
    FillConsoleOutputCharacter(hConsole, TEXT(' '),
                               dwConSize, coordScreen, &cCharsWritten);
    GetConsoleScreenBufferInfo(hConsole, &csbi);
    FillConsoleOutputAttribute(hConsole, csbi.wAttributes,
                               dwConSize, coordScreen, &cCharsWritten);
    SetConsoleCursorPosition(hConsole, coordScreen);
}
int min_arr(float*,int);
int max_arr(float*,int);

    void main(void)

{
    string month[12] = {"January", "Febuary", "March", "April",
        "May", "June", "July", "August", "September", "October",
        "November", "December"};
    float rainfall[12];
    float avg = 0.00;
    float sum = 0.00;
    int i;
    int y = 5;
    int x = i + 1;
    
    gotoxy(10,4);
    cout << "Month" << endl;

    gotoxy(20,4);
    cout << "Rainfall" << endl;

    for(i = 0; i < 12; i++)
    {
        y++;
        gotoxy(10,y);
        cout << month[i] << endl;

        gotoxy(20,y);
        cin >> rainfall[i];
    }

    for(i = 0; i < 12; i++)
    {
        sum = sum + rainfall[i];
    }

    avg = sum/12;

    /*  im not sure what code id need here to find the highest and lowest values

for(i = 0; i < 12; i++)
    {
        if(rainfall[i] > rainfall[x]);
    }

*/

    gotoxy(10,20);
    cout << "Average rainfall for 12 months is " << avg << "mm" << endl;
    gotoxy(10,21);
    //cout<<"max="<<max_arr(rainfall,12)<<endl;
    cout<<"Min rainfall in "<<month[min_arr(rainfall,12)]<<endl;
    gotoxy(10,24);
    cout<<"Max rainfall in "<<month[max_arr(rainfall,12)]<<endl;
    //cout<<"min="<<min_arr(rainfall,12)<<endl;
/*this is where i need to display the values and according months


cout << "The month with the highest rainfall is " << month[i] << " at " << rainfall[i] << "mm." << endl;
    gotoxy(10,22);
    cout << "The month with the lowest rainfall is " << month[i] << " at " << rainfall[i] << "mm." << endl;

*/

    _getch();
    }
int max_arr(float *a,int n)
{
float m;
int nn;
m=*a;
for(short i=1;i<n;i+=1)
if(m<*(a+i)) {m=*(a+i);nn=i;}
return nn;
}
int min_arr(float *a,int n)
{
float m;
int nn;
m=*a;
for(short i=1;i<n;i+=1)
if(m>*(a+i)) {m=*(a+i);nn=i;}
return nn;
}
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