fact.scala

来自「JAVA 语言的函数式编程扩展」· SCALA 代码 · 共 31 行

#!/bin/sh
# fact - A simple Scala script that prints out the factorial of
#        the argument specified on the command line.

cygwin=false;
case "`uname`" in
    CYGWIN*) cygwin=true ;;
esac

SOURCE="$0";
if $cygwin; then
    if [ "$OS" = "Windows_NT" ] && cygpath -m .>/dev/null 2>/dev/null ; then
        format=mixed
    else
        format=windows
    fi
    SOURCE=`cygpath --$format "$SOURCE"`;
fi

exec scala -nocompdaemon "$SOURCE" "$@"
!#


val x = argv(0).toInt

def fact(x: Int):Int =
  if(x==0) 1
  else x*fact(x-1)

Console.println("fact(" + x + ") = " + fact(x))