1、题目:
2、程序代码:
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner get=new Scanner(System.in);
String str=get.next();
char ch[]=str.toCharArray();
for(int i=0;i<ch.length;i++) {
if(ch[i]>'Z') {//A为65,a为97,将小写转化为大写
ch[i]-=('a'-'A');
}else if(ch[i]<='Z') {
ch[i]+=('a'-'A');
}
}
for(int i=0;i<ch.length;i++) {
System.out.print(ch[i]);
}
get.close();
}
}
3、补充: