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BinaryReader #23
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BinaryReader #23
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30 changes: 30 additions & 0 deletions
30
src/com/codefortomorrow/intermediate/chapter10/practice/BinaryReader.java
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package com.codefortomorrow.intermediate.chapter10.practice; | ||
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/* | ||
Create a program called BinaryReader in which a 4 x 4 | ||
array of booleans is created. Have the computer loop | ||
through the array, printing a 0 if the current element is | ||
set to false and a 1 if it set to true. | ||
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||
Example Array: | ||
{ | ||
{true, false, false, true}, | ||
{false, true, true, true}, | ||
{true, true, false, true}, | ||
{true, false, false, false} | ||
} | ||
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Example Output: | ||
1001 | ||
0111 | ||
1101 | ||
1000 | ||
*/ | ||
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public class BinaryReader | ||
{ | ||
public static void main(String[] args) | ||
{ | ||
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} | ||
} |
60 changes: 60 additions & 0 deletions
60
src/com/codefortomorrow/intermediate/chapter10/solutions/BinaryReader.java
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package com.codefortomorrow.intermediate.chapter10.solutions; | ||||||||
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/* | ||||||||
Create a program called BinaryReader in which a 4 x 4 | ||||||||
array of booleans is created. Have the computer loop | ||||||||
through the array, printing a 0 if the current element is | ||||||||
set to false and a 1 if it set to true. | ||||||||
|
||||||||
Example Array: | ||||||||
{ | ||||||||
{true, false, false, true}, | ||||||||
{false, true, true, true}, | ||||||||
{true, true, false, true}, | ||||||||
{true, false, false, false} | ||||||||
} | ||||||||
|
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Example Output: | ||||||||
1001 | ||||||||
0111 | ||||||||
1101 | ||||||||
1000 | ||||||||
*/ | ||||||||
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public class BinaryReader | ||||||||
{ | ||||||||
public static void main(String[] args) | ||||||||
{ | ||||||||
//Create a 2D array of booleans | ||||||||
boolean[][] arr = | ||||||||
{ | ||||||||
{true, false, false, true}, | ||||||||
{false, true, true, true}, | ||||||||
{true, true, false, true}, | ||||||||
{true, false, false, false} | ||||||||
}; | ||||||||
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//Loop through the array using nested loops | ||||||||
for(int i = 0; i < arr.length; i++) | ||||||||
{ | ||||||||
for(int j = 0; j < arr[0].length; j++) | ||||||||
{ | ||||||||
//Check if current element is set to true | ||||||||
if(arr[i][j] == true) | ||||||||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. You can actually change this line to
Suggested change
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{ | ||||||||
//Print out a 1 if set to true | ||||||||
System.out.print(1); | ||||||||
} | ||||||||
//Otherwise, current element is set to false | ||||||||
else | ||||||||
{ | ||||||||
//Print out a 0 if set to false | ||||||||
System.out.print(0); | ||||||||
} | ||||||||
} | ||||||||
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//Move over to the next line | ||||||||
System.out.println(); | ||||||||
} | ||||||||
} | ||||||||
} |
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Instead of having them create an array themselves, you might want to consider having this be a method instead (the 4x4 array is the parameter and the method either prints or returns the string)