字符串 反转

LC 反转字符串

• swift 实现

    var s: [Character] = ["h","e","l","l","o"]
    reversString(&s)
    print(s)

    func reversString(_ s: inout [Character]) {
    
        
        var temp: [Character] = []
        
        var index = s.count - 1
        
        while index >= 0 {
    
            
            temp.append(s[index])
            
            index -= 1
        }
        
        s = temp
    }