这样会报错的在swift3.0里面，怎么解决？
func toBinary( num:Int)->String{
var num = num
var res = ""
repeat{
res = String(num%2) + res
num /= 2.0
}while num != 0 {
return res
}
}
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func toBinary( num:Int)->String{
var num = num
var res = ""
repeat{
res = String(num%2) + res
num /= 2.0
}while num != 0 {
return res
}
}
2017-01-04
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