问个问题，浙大到底跳了几个？ (转载) - 未名空间MITBBS历史存档

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问个问题，浙大到底跳了几个？ (转载)

问个问题，浙大到底跳了几个？ (转载)# Biology - 生物学

w*n2012-12-13 08:12

1 楼

main()
{
char *c1 = "abc";
char c2[] = "abc";
char *c3 = ( char* )malloc(3);
c3 = "abc";
printf("%d %d %s\n",&c1,c1,c1);
printf("%d %d %s\n",&c2,c2,c2);
printf("%d %d %s\n",&c3,c3,c3);
getchar();
}
运行结果
2293628 4199056 abc
2293624 2293624 abc
2293620 4199056 abc
看运行结果
为什么c2所指的地址，
和c2 自己的地址是一样，
我运行了，也是这样的。

f*r2012-12-13 08:12

2 楼

【以下文字转载自 Chemistry 讨论区】
发信人: fatblackliar (轻风拂山岗), 信区: Chemistry
标题: 问个问题，浙大到底跳了几个？
发信站: BBS 未名空间站 (Thu Dec 13 12:19:27 2012, 美东)
听说涂博士之后还是很多啊

j*x2012-12-13 08:12

3 楼

The exceptions to this rule are when the array identifier is an
operand of either the sizeof or address-of (&) operators. When the
array is an operand of the & operator, the result is of type "pointer
to N-element array of T", or T (*a)[N], and its value is the address
of the base of the array, which is the same as the address of the
first element of the array.

h*62012-12-13 08:12

4 楼

是数组的特殊性，数组和指针不多的区别之一。
试试这个：
char* c4 = c2;
printf("%d %d %s\n",&c4,c4,c4);

r*y2012-12-13 08:12

5 楼

那如何才能得到存储 c2这个变量的地址？

【在 j********x 的大作中提到】

: The exceptions to this rule are when the array identifier is an
: operand of either the sizeof or address-of (&) operators. When the
: array is an operand of the & operator, the result is of type "pointer
: to N-element array of T", or T (*a)[N], and its value is the address
: of the base of the array, which is the same as the address of the
: first element of the array.