请指教,谢谢
#include <stdio.h>main()
{ int s;
while ((s=getchar())!=‘\n’)
{ switch (s-‘2’)
{ case 0:
case 1: putchar (s+4);
case 2: putchar (s+4); break;
case 3: putchar (s+3);
default: putchar (s+2); break;
}
printf (“\t”);
}
}
如果输入2473,结果是多少,为什么,请指教!