#include <stdio.h>
int main() {
         char ch;
         ch = getchar();
         putchar( ch );
         printf("%c",ch);
         return 0;
{

 

------------恢复内容开始------------

#include <stdio.h>
int main() {
         char ch;
         ch = getchar();
         putchar( ch );
         printf("%c",ch);
         return 0;
{

 

------------恢复内容结束------------