igorryabtsev / factorial-zero-counter Goto Github PK

The program counts zeros at the end of the factorial value of a number. We take into account that given number no more then Long.MAX_VALUE = 9223372036854775807, just for convenience.

To compile it's necessary execute:

mvn clean install -Dlog4j.configuration=PATH_TO_LOG4J_PROPERTIES

Where PATH_TO_LOG4J_PROPERTIES is a path to log4j.properties file. Now it's located in src/main/resources/log4j.properties.
In log4j.properties you can change file for logging.

To execute it's necessary to execute JAR located in target.

java -jar factorial-zero-ends-counter.jar

You can use -h key to look how to use app.

java -jar factorial-zero-ends-counter.jar -h

Output:

usage: factorial-zero-ends-counter [options] [number]
-h,--help Display usage.
-n,--number Given number for calculations. No more than Long.MAX_VALUE. Default value is 1000.

Default number is 100

The example how to start app and save metadata to res.csv file using 5 threads and with input order:

• It's necessary to compile project:
  mvn clean install -DskipTests -Dlog4j.configuration=${PATH_TO_PROJECT}/src/main/resources/log4j.properties
• Execute jar file:
  java -jar factorial-zero-ends-counter.jar -n 1000