单项选择题下列程序段的输出结果是
int n="c";
switch(n++)
{default: printf("error");break;
case "a": case "A": case "b": case "B": printf("good");break;
case "c": case "C": printf("pass");
case "d": case "D": printf("warn");
}

A.passwarn
B.passerror
C.goodpasswarn
D.pass