Write a program that reads a single number and prints the triple of its value.
Your program should read from the standard input and print to the standard output. The standard input and output devices are usually the keyboard and screen of a command line session. Here are a few example sessions:
$ ./triple1 2 6 $ ./triple1 123 369
The input contains a single line with one integer x where
0 ≤ x ≤ 100 000.
The output should contain a single integer y where y = 3x. The output should be followed by a line break.
Your program should be implemented using a
that receives one integer as argument and returns an integer.
Please refer to the information for your chosen language:
int triple(int x);
triple :: Int -> Int
int triple(int x);
public static int Triple(int x)inside a class
public static int triple(int x)inside a public class
triple function should not print anything.
It should just perform the computation and return an integer.
The function and input/output processing
must exist in the same program.
Create a single submission with the function and main program.
If you’re confused, try earning a partial score first.
Submit your solution to be graded according to the following list:
Automated judge: Keep in mind that when your program is submitted it will not be run by a human but instead by an automated judge. Instructions should be followed exactly or the judge will not give you a full score.
Your program should not print messages like
Please type a number: or
The triple is 33.
Instead, just print the resulting number
followed by a line break
as in the example output.
Your program should print the addition result then exit immediately.
Do not use
sleep(1) or anything of sorts.
Redirecting input: On most systems (Windows / Linux / OS X), it is possible to redirect the standard input and output of your program to files, like so:
$ ./triple1 <inputfile.txt >outputfile.txt
If you create a plain text file with the “example input”, the above command should produce a plain text file with the “example output”.
On Windows, you should not use
./ to run a program in the current directory,
C:\> triple1.exe 12 36
Beware of the data types.
Users of Python and dinamically-typed languages beware.
triple function will be tested
with proper integer values as its argument
and not with integers encoded in strings.
For example, it will be tested as
but never as
try first: repeat1
try also: inc1
try next: add1
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