OK，所以在Code-Golf的精神，我在这里尝试新的东西：Code-Bowling。
在高尔夫球，你试图得到最低的得分(最小的应用程序，最优雅等)。在保龄球，你试图得到最高分。所以，如果你遵循，Code-Bowling挑战的目标是使最大，最混蛋，最难维护的代码仍然满足挑战的要求。然而，没有意义，使源更长只是为了它的缘故。它需要看起来像添加的长度是从设计，而不只是填充。
这里是这个挑战：
用您选择的语言编写一个程序，创建一行文本输出并终止。创建的输出必须与此正则表达式匹配：
- /^Good (Morning|Afternoon|Evening|Night)$/
- /*
- * TODO: write manpage
- */
- #include <assert.h>
- #include <fcntl.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #define ERROR_MAX 2048 /* arbitrary,must account for argv[0] */
- #define MSG_SIZE (5+9+1) /* +1 for newline,+1 for NUL */
- #if defined(linux) || defined(BSD) && BSD > 199300L
- extern char const *__progname;
- # define progname __progname
- #else
- static char *progname;
- #endif
- typedef enum _Progerr {
- IO_ERR = 1,RND_ERR = 2
- } progerr_t;
- static const char GREET_START[5] = "Good"; /* XXX move to Makefile? */
- static const char *TIMES_OF_DAY[5] = {
- "Morning","Afternoon","Evening","Night",NULL
- };
- int main()
- {
- char errbuf[ERROR_MAX];
- char msgbuf[MSG_SIZE];
- char *slash;
- const char **time_of_day;
- int fd,rnd;
- size_t greet_len;
- #ifndef progname
- /* we want proper error messages */
- progname = argv[0];
- if ((slash = strrchr(progname,'/')) != NULL)
- progname = slash+1;
- #endif
- /* get REAL randomness; can't trust rand(3).
- * avoid stdio,it's slow. */
- #ifdef DEBUG
- write(STDERR_FILENO,"getting random data\n",sizeof("getting random data\n")-1);
- #endif
- if ((fd = open("/dev/urandom",O_RDONLY)) == -1) {
- if ((fd = open("/dev/random",O_RDONLY)) == -1)
- rnd = rand(); /* last resort,for MSYS etc. */
- }
- if (fd >= 0 && read(fd,&rnd,sizeof(int)) != sizeof(int)) {
- close(fd);
- goto rngerr;
- }
- /* higher bits of rand() have better entropy */
- assert(sizeof(int) >= 4); /* should be compile-time assert */
- rnd = (rnd >> 24) & 0x03;
- for (time_of_day = TIMES_OF_DAY; *time_of_day && rnd; time_of_day++,rnd--)
- ;
- if (!time_of_day)
- goto rngerr;
- sprintf(msgbuf,"%s %s",GREET_START,*time_of_day);
- greet_len = strlen(msgbuf);
- msgbuf[greet_len] = '\n';
- if (write(STDOUT_FILENO,msgbuf,greet_len+1) == -1)
- goto write_err;
- return 0;
- rngerr:
- sprintf(errbuf,"%s: cannot get random data\n",progname);
- write(STDERR_FILENO,errbuf,strlen(errbuf));
- return (int)RND_ERR;
- write_err:
- sprintf(errbuf,"%s: cannot write to stdout\n",strlen(errbuf));
- return (int)IO_ERR;
- }
