str = "%i+2"
str1 = str % [3]
count = 3
m = eval("%i+2" % [count])
puts m
转载于:https://www.cnblogs.com/zhangfei/archive/2010/11/20/1882630.html
str = "%i+2"
str1 = str % [3]
count = 3
m = eval("%i+2" % [count])
puts m
转载于:https://www.cnblogs.com/zhangfei/archive/2010/11/20/1882630.html