1define i(x) { 2 ibase=x 3 return ibase 4} 5 6define o(x) { 7 obase=x 8 return obase 9} 10 11define r(x) { 12 scale=x 13 return scale 14} 15 16i(11) 17ibase 18o(12) 19obase 20r(15) 21scale 22