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Is there a simple option?

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Join Date: Apr 2008

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Is there a simple option?

May 17th, 2008

Hey, I got bored so was making this program and i know how to get the highest and lowest number but I was wondering if there was a even quicker way, or would :

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 C++ Syntax (Toggle Plain Text) 
if( number1 > number2 && number1 > number3)
    highNum = number1;
 
    else if( number2 > number1 && number2 > number3)
    highNum = number2;
 
    else if( number3 > number1 && number3 > number2)
    highNum = number3;
 
    if( number1 < number2 && number1 < number3)
    lowNum = number1;
 
    else if( number2 < number1 && number2 < number3)
    lowNum = number2;
 
    else if( number3 < number2 && number1 < number1)
    lowNum = number3;
if( number1 > number2 && number1 > number3)
    highNum = number1;
    
    else if( number2 > number1 && number2 > number3)
    highNum = number2;
    
    else if( number3 > number1 && number3 > number2)
    highNum = number3;
    
    if( number1 < number2 && number1 < number3)
    lowNum = number1;
    
    else if( number2 < number1 && number2 < number3)
    lowNum = number2;
    
    else if( number3 < number2 && number1 < number1)
    lowNum = number3;

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Re: Is there a simple option?

May 17th, 2008

put the numbers in an array

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 C++ Syntax (Toggle Plain Text) 
int array[3] = {3,1,5};
int largest = array[0];
int smallest = array[0];
for(int i = 1; i < 3; i++)
{
    if( array[i] > largest)
        largest = array[i];
    // now do similar for smallest
}
int array[3] = {3,1,5};
int largest = array[0];
int smallest = array[0];
for(int i = 1; i < 3; i++)
{
    if( array[i] > largest)
        largest = array[i];
    // now do similar for smallest
}

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Re: Is there a simple option?

May 17th, 2008

Potentially quicker, you can use the STL min and max template functions. It's definitely easier, but it gets tedious with more than a few numbers:

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 C++ Syntax (Toggle Plain Text) 
#include <iostream>
#include <algorithm>
 
int main()
{
  int a = 0;
  int b = 1;
  int c = 2;
 
  std::cout << "Low number: " << std::min(std::min(a, b), c) << '\n';
  std::cout << "High number: " << std::max(std::max(a, b), c) << '\n';
}
#include <iostream>
#include <algorithm>

int main()
{
  int a = 0;
  int b = 1;
  int c = 2;

  std::cout << "Low number: " << std::min(std::min(a, b), c) << '\n';
  std::cout << "High number: " << std::max(std::max(a, b), c) << '\n';
}

Last edited by Radical Edward; May 17th, 2008 at 10:37 am.

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Re: Is there a simple option?

May 17th, 2008

How about:

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 C++ Syntax (Toggle Plain Text) 
#include <algorithm>
#include <iostream>
using namespace std;
 
int main()
  {
  int numbers[] = { 12, -7, 42, 9 };
 
  cout << "largest  = " << max_element( numbers, numbers +4 ) << endl;
  cout << "smallest = " << min_element( numbers, numbers +4 ) << endl;
  }
#include <algorithm>
#include <iostream>
using namespace std;

int main()
  {
  int numbers[] = { 12, -7, 42, 9 };

  cout << "largest  = " << max_element( numbers, numbers +4 ) << endl;
  cout << "smallest = " << min_element( numbers, numbers +4 ) << endl;
  }

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Re: Is there a simple option?

May 18th, 2008

using c++09 variadic templates http://www.osl.iu.edu/~dgregor/cpp/v...-templates.pdf

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include <iostream>
 
template < typename T > T largest( T first, T second )
{  return first > second ? first : second ; }
 
 
template < typename T, typename... U > T largest( T first, U... rest )
{ return largest( first, largest( rest... ) ) ; }
 
int main()
{
   int n1=5, n2=7, n3=1 ; 
   std::cout << largest( n1, 4, n2 ) << '\n' ;
   std::cout << largest( n1, 78, 3, n2, 12, n3 ) << '\n' ;
}
 
// compile with: g++43 -Wall -std=c++0x -pedantic -Werror myfile.cc
#include <iostream>

template < typename T > T largest( T first, T second )
{  return first > second ? first : second ; }


template < typename T, typename... U > T largest( T first, U... rest )
{ return largest( first, largest( rest... ) ) ; }

int main()
{
   int n1=5, n2=7, n3=1 ; 
   std::cout << largest( n1, 4, n2 ) << '\n' ;
   std::cout << largest( n1, 78, 3, n2, 12, n3 ) << '\n' ;
}

// compile with: g++43 -Wall -std=c++0x -pedantic -Werror myfile.cc

Last edited by vijayan121; May 18th, 2008 at 12:20 am.

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Re: Is there a simple option?

May 18th, 2008

Geek.

/me runs off to try out this super coolness....

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Re: Is there a simple option?

May 18th, 2008

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Originally Posted by vijayan121

using c++09 variadic templates http://www.osl.iu.edu/~dgregor/cpp/v...-templates.pdf
Help with Code Tags

C++ Syntax (Toggle Plain Text)
#include <iostream>
 
template < typename T > T largest( T first, T second )
{  return first > second ? first : second ; }
 
 
template < typename T, typename... U > T largest( T first, U... rest )
{ return largest( first, largest( rest... ) ) ; }
 
int main()
{
   int n1=5, n2=7, n3=1 ; 
   std::cout << largest( n1, 4, n2 ) << '\n' ;
   std::cout << largest( n1, 78, 3, n2, 12, n3 ) << '\n' ;
}
 
// compile with: g++43 -Wall -std=c++0x -pedantic -Werror myfile.cc
#include <iostream> template < typename T > T largest( T first, T second ) { return first > second ? first : second ; } template < typename T, typename... U > T largest( T first, U... rest ) { return largest( first, largest( rest... ) ) ; } int main() { int n1=5, n2=7, n3=1 ; std::cout << largest( n1, 4, n2 ) << '\n' ; std::cout << largest( n1, 78, 3, n2, 12, n3 ) << '\n' ; } // compile with: g++43 -Wall -std=c++0x -pedantic -Werror myfile.cc

just amazing.... {i had no intention of spamming , but this code is awesome...}