以下C程序片段的内容是什么?
char c[] = "GATE2011";
char *p =c;
printf("%s", p + p[3] - p[1]) ;
(A)门
(B) E2011
(C) 2011
(D) 011答案: (C)
说明:请参阅注释以获取说明。
char c[] = "GATE2011";
// p now has the base address string "GATE2011"
char *p = c;
// p[3] is 'E' and p[1] is 'A'.
// p[3] - p[1] = ASCII value of 'E' - ASCII value of 'A' = 4
// So the expression p + p[3] - p[1] becomes p + 4 which is
// base address of string "2011"
printf("%s", p + p[3] - p[1]); // prints 2011
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