result.java

package demo;

public class DemoTranslation {
	
	public static int search ( int arr [ ], int arr_len, int x ) {
		for ( int i = 0; i < arr_len; i++ ) if ( arr [ ( int ) i ] == x ) return ( int ) i;
		return - 1;
	}
	public static int verifyFactorial ( int num ) {
		int fact = 1;
		if ( num < 0 ) {
			fact = - 1;
		}
		else if ( num > 1 ) {
			do {
				fact = fact * num;
				num = num - 1;
			}
			while ( num > 1 );
		}
		else {
			fact = 1;
		}
		return fact;
	}
	public static void main ( String[] args ) {
		int arr [ ] = { 1, 2, 3, 4, 5, 6 };
		int num = 6;
		int result = search ( arr, 6, num );
		System.out.print( "");
		System.out.print( result );
		System.out.print( "\n");
		result = factorial ( num );
		System.out.print( "");
		System.out.print( result );
		System.out.print( "\n");
	}
	public static int factorial ( int num ) {
		int copyNum = num;
		int fact = 1;
		if ( num < 0 ) fact = - 1;
		else {
			while ( num > 1 ) {
				fact = fact * num--;
			}
		}
		return fact == verifyFactorial ( copyNum ) ? fact : - 2;
	}
}