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So on to the question.
Write a program that prints the numbers from 1 to 100. But for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz.” For numbers which are multiples of both three and five print “FizzBuzz.”Seems simple enough right? Don't overthink this one. Let's break it down."Write a program that prints the numbers from 1 to 100." Okay so we need a loop. What kind of loop? Well you can do lots of things here, try and wow them with a recursive loop, use a do..while or a for loop. Let's use the KISS method and go with a for loop.
for (int i=1;i<=100;i++) {
cout << i << endl; }
Done deal. We're printing out the numbers from 1 to 100. Now onward."But for multiples of three print “Fizz”" Alright remember, how we can find out if something is a multple of three? Hmm? Divide it by 3? Is there a remainder? No? Well it's divisible by 3 then. duh. So use the dreaded mod here.
for (int i=1;i<=100;i++) {
if (i % 3 == 0)
cout << "Fizz"<< endl;
else
cout << i << endl;
}
Alright now I think you have this, continue on in this method and check if it's divisible by 5...
for (int i=1;i<=100;i++) {
if (i % 3 == 0)
cout << "Fizz"<< endl;
else if (i % 5 == 0)
cout << "Buzz"<< endl;
else
cout << i << endl;
}
Oops! It seems that we've backed into a corner and missed the final step of requirements. For numbers which are multiples of both three and five print “FizzBuzz.”. Just by eliminitating the else if and the line breaks we should have it then, right?
int main() {
for (int i=1;i<=100;i++) {
if (i % 3 == 0)
cout << "Fizz";
if (i % 5 == 0)
cout << "Buzz";
if (i % 3 != 0 && i % 5 != 0)
cout << i;
cout << endl;
}
}
"But I can write this so much more elegantly!" You say. Please do. That is what will separate you from the rest of the pack.
3 comments:
I'm not sure how to make it look nice with correct spacing, but it was a fun exercise so here it is in Java. The recursive version is also included.
package com.fizzbuzz;
public class FizzBuzz
{
public static void main( String[] args )
{
fizzBuzzForLoop();
System.out.println();
fizzBuzzRecursion( 1, 100 );
}
public static void fizzBuzzForLoop()
{
for( int i = 1; i <= 100; i++ )
{
if( (i % 3) == 0 )
{
System.out.print( "Fizz" );
}
if( (i % 5) == 0 )
{
System.out.print( "Buzz" );
}
if ( (i % 3) != 0 && (i % 5) != 0 )
{
System.out.print( i );
}
System.out.print( " " );
}
}
public static void fizzBuzzRecursion(int start, int finish)
{
if( start > finish )
{
return;
}
if( (start % 3) == 0 )
{
System.out.print( "Fizz" );
}
if( (start % 5) == 0 )
{
System.out.print( "Buzz" );
}
if ( (start % 3) != 0 && (start % 5) != 0 )
{
System.out.print( start );
}
System.out.print( " " );
fizzBuzzRecursion( ++start, finish );
}
}
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