When is the last time we try to
arrange or sort as series of numbers using pen and paper? That’s ok
if you are trying to sort or arrange numbers that are very few but
what is your are dealing of many numbers it seems that job is not
easy using manual operation just like using pen and paper it very
prone to errors and it takes a lot of effort in our part to sort each
number in proper order. One of the benefits of your computers in
general it helps us making our lives easier and less effort. The
computer is a complex machine and has the ability to perform fast
computation compared to its human counterparts. Sorting in computer
science mean it is the arrangement of numbers, letters or works in
ascending or descending order. Let me explain the two types of
sorting arrangement in details.
Ascending sort mean that we arrange
the numbers, texts or words small the smallest value to the highest
number values. In terms of letters we start with letter A to Z as
simple as that in ascending order. On the other hand descending order
is the opposite of ascending order in this case from the biggest
number value to the smallest number value or Z to A in terms in
alphabets. In our sample code here I am not using any sorting
algorithms to sort these three numbers. All we need is the use of the
if – else statement to compare which of the three numbers is the
smallest, middle and the highest number.
I call this program Sorting Three
Numbers this program is not difficult but we must able to understand
its inner logic with its conditional statement we use here that is
If-Else statement in C++. The first thing that our program will do is
to ask the user to enter three numbers simultaneously. In this case
we assign three variables A,B,C. After we ask the user to enter three
integer number our program will process this values using a series of
conditional statements in C++.
if(a<b){
if(a<c){
cout<<a<<",
";
if(c<b)
cout<<c<<",
"<<b<<"\n";
else cout<<b<<",
"<<c<<"\n";
}
In this code if variable a is less
than B then proceed with the second if statement if (a < c) if
the condition in true then the smallest number is A will be displayed
in our screen. This if-else statement that we have right now is
called compounded or nested if-else statement because we have the
outer if statement and inner if-else statement inside of it. The
third condition is we select variable C that is the smallest number
from the list of three given earlier by our user. So the arrangement
if variable C is smallest will be cout<<c<<",
"<<b<<"\n"; this means c is the smallest
value and followed by b. If the condition is not true then it proceed
with next statement that is cout<<b<<", "<<c<<"\n";
that meaning of this command is the variable B is the smallest value
and then followed by the second value that is variable C.
else{
cout<<c<<",
";
if(a<b) cout<<a<<",
"<<b<<"\n";
else cout<<b<<",
"<<a<<"\n";
}
}
In this section of our code I will
explain that if both two conditions is false then this will be the
last condition of our first if-else statement by this time the value
of variable C will be displayed in the screen and then we have
another condition that tells us if (a<b) then the display will be
cout<<a<<", <<b<<"\n"; and
will followed by our else statement cout<<b<<",
"<<a<<"\n";. At this point we can clearly
see that we just rearrange the placement of our variable the fits in
our condition. We are just dealing only with three numbers.
The second if-else statement we are
dealing the if (b <c) then the display will be cout <<b<<”.”;
Another condition if (a <c) the it will display cout << a
<<”,” <<c<<”\n”; but it the condition is
false it will display the cout << c<<”,”<<a<<”\n”;
if(b<c){
cout<<b<<",
";
if(a<c) cout<<a<<",
"<<c<<"\n";
else cout<<c<<",
"<<a<<"\n";
}
This is the last part of our code by
this time we are dealing with the variable C is the condition is
false then it will display the value of variable C. Next will follow
the condition of if (a<b) then it will display cout << a <<
“,” <<c<<”\n”; and then if it is false it will
display the following statements to the user cout<<b<<",
"<<a<<"\n";
else{
cout<<c<<",
";
if(a<b) cout<<a<<",
"<<c<<"\n";
else cout<<b<<",
"<<a<<"\n";
}
}
After the execution of our program
it will display a message that thanking the user for using our
program and then it will return to your operating system. I hope you
have learned something new in this article sorting three numbers. In
this article I’m using CodeBlocks as my text editor and Dev C++
that is being integrated within our Codeblocks text editor. If you
have some comments, questions and suggestions feel free to email me.
Thank you very much.
Sample Output Of Our Program
Code::Blocks text editor that is being used in writing this program
Program Listing
#include <iostream>
using namespace std;
int main()
{
int a=0, b=0, c=0;
cout << "\t <======
SORTING THREE NUMBERS =====>";
cout << "\n\n";
cout<<"Please Enter
Three Numbers :=> ";
cin>>a>>b>>c;
cout << "\n\n";
cout<<"Numbers sorted
in Ascending Order : ";
if(a<b){
if(a<c){
cout<<a<<",
";
if(c<b)
cout<<c<<",
"<<b<<"\n";
else cout<<b<<",
"<<c<<"\n";
}
else{
cout<<c<<",
";
if(a<b) cout<<a<<",
"<<b<<"\n";
else cout<<b<<",
"<<a<<"\n";
}
}
else{
if(b<c){
cout<<b<<",
";
if(a<c) cout<<a<<",
"<<c<<"\n";
else cout<<c<<",
"<<a<<"\n";
}
else{
cout<<c<<",
";
if(a<b) cout<<a<<",
"<<c<<"\n";
else cout<<b<<",
"<<a<<"\n";
}
}
cout << "\n\n";
cout << "THANK YOU FOR
USING THIS PROGRAM";
cout << "\n\n";
system("pause");
}
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