public static void main(String[] args){
Scanner sth=new Scanner(System.in);
String cd=sth.next ();
char ab[]=cd.toCharArray();
for(int i=0;i<ab.length;i++) {
System.out.println(ab[i]);
}
}
/*char转化为int时要减去48
int转化为char时要加上48
public static void main(String[] args) {
Scanner reader=new Scanner(System.in);
System.out.print("请输入一个整数:");
String a=reader.next();
char ch[]=a.toCharArray();
int s=0;
for(int i=0;i<ch.length;i++) {
s=s+(int)ch[i]-48;
}
System.out.println(s);
}
*/