1 #include<stdio.h>
2
3 int main()
4 {
5 int i=43;
6 printf("%d",printf("%d",printf("%d",i)));
7
8 return 0;
9 }
10
11 这是一个社区的验证码，让输出结果，很有意思。
12 结果是4321.
13 printf()的返回值：On success, the total number of characters written is returned.
14 On failure, a negative number is returned.