문자열 뒤집기

- Java

public static void reverse(char[] s, int index) {
    if(index==0) {
        return;
    }else {
        System.out.print(s[index-1]);
    reverse(s, index-1);
    }
}

public static void main(String[] args) {
    char[] s = {'h','e','l','l','o'};
    reverse(s, s.length);
}

public static void reverse(char[] s, int f, int t) {
    if(f>t) {
        return;
    }else {
        reverse(s, f+1, t);
        System.out.print(s[f]);
    }
}

public static void main(String[] args) {
    char[] s = {'h','e','l','l','o'};
    reverse(s, 0, s.length-1);
}

 

- Swift

func reverse(s: [Character], index: Int){
    if index == 0 {
        return
    }else {
        print(s[index-1], terminator: "")
        reverse(s: s, index: index-1)
    }
}
var s: [Character] = ["h","e","l","l","o"]
reverse(s: s, index: s.count)

 

[결과]