#!/usr/bin/env ruby
#-*- coding: utf-8 -*-
print("何回やりたい?")
kaisuu=gets.to_i
sleep(1)
i=0
while i<kaisuu
srand()
hazime=rand(1..10).to_f
tasu = rand(1..10).to_f
hiku = rand(1..10).to_f
kakeru=rand(1..10).to_f
waru=rand(1..10).to_f
printf("%d+%d-%d×%d÷%dは何でしょう?\n",hazime,tasu,hiku,kakeru,waru)
kotae=hazime+tasu-hiku*kakeru/waru
puts"入力"
gets
printf("答えは%2.3fです。正解かな?\n",kotae)#少し結果が違う
i+=1
puts""
sleep(1)
end