这是我用来检查计算的一段代码,我只是将这些值写入
Xcode的控制台.使用下面显示的值声明每个数组.
@H_301_28@解决方法
var water_deficit: [Int] = []
该程序计算缺水值并将其附加到此列表中(计算未显示)
let months = ["January","Feburary","March","April","May","June","July","August","September","October","November","December"]
let rainfall = [38,94,142,149,236,305,202,82,139,222,178,103]
let raindays = [3,6,8,7,12,16,10,14,11,7]
for i in 0...11 {
println("\(months[i]) \t \(rainfall[i]) \t \(raindays[i]) \t \(water_deficit[i])")
}
Month Rainfall Raindays Water Deficit January 38 3 38 Feburary 94 6 -18 March 142 8 -8 April 149 7 -1 May 236 12 116 June 305 16 301 July 202 10 202 August 82 8 82 September 139 12 101 October 222 14 203 November 178 11 208 December 103 7 103
如您所见,因为单词/数字的长度不同,所以列是偏移的.如何生成特定宽度的列以避免此问题,我需要做什么？
试试这个：
for i in 0...11 {
let month = (months[i] as NSString).UTF8String
println(String(format:"%-10s %10d %10d %10d",month,rainfall[i],raindays[i],water_deficit[i]))
}
在let month =(months [i] as NSString).UTF8String我正在应用conversion from String to C String：在C字符串的格式说明符中指定长度非常容易,但我不知道如何为字符串执行此操作(我的猜测是不可能).