In C, it might not be possible to have function names on left side of an expression, but it’s possible in C++.
1 #include<iostream>
2 using namespace std;
3
4 /* such a function will not be safe if x is non static variable of it */
5 int &fun()
6 {
7 static int x;
8 return x;
9 }
10
11 int main()
12 {
13 fun() = 10;
14
15 /* this line prints 10 on screen */
16 printf(" %d ", fun());
17
18 getchar();
19 return 0;
20 }
不过，貌似C语言中也是可以的，比如下面的例子。
1 #include<stdio.h>
2 int* fun()
3 {
4 static int x;
5 return &x;
6 }
7
8 int main()
9 {
10 *(fun()) = 10;
11 /* this line prints 10 on screen */
12 printf(" %d ", *(fun()));
13 return 0;
14 }
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2013-11-27 12:23:57