def sum( x )
	a = 0
	x.length.times { |i|
		a += x[ i ]
	}
	return a
end

x = [ 7 , 6 , 4 , 2 , 5 ]
y = [ 24 , 20 , 14 , 8 ,12 ]

s_x = sum( x )
s_y = sum( y )

printf( "配列xの合計は%d，配列yの合計は%dです\n" , s_x , s_y )