import java.io.*;
public class ch7_1
{
public static void main(String args[])throws IOException
{
char a ='A';
System.out.write(a);
System.out.write('\n');//Õâ¾äΪʲôһ¶¨Òª¼ÓÉϰ¡£¿
}
}
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System.out.println(a);
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