集12个main为一身的C程序竟然也能运行，而且可移植性为100%
今天无意中在网上看到一个C的程序，简单，却深奥。据说是个大师写的，实在是令人感到恐怖。
这样的程序竟然也能运行？ 没想到吧 ！ 什么事情都有可能发生，而且这样的事情还多着呢？如果你只是被它的结构迷惑，那没关系，不过…… 程序的运行结果可能会让你更加吃惊了。这不得不让我想起“The Tao of Programming”中的一句话“编程大师的程序再凌乱，也用不着测试，因为它是正确的”。
程序的源代码如下：
- #include <stdio.h>
- main(t,_,a)char *a;{return!0<t?t<3?main(-79,-13,a+main(-87,1-_,
- main(-86,0,a+1)+a)):1,t<_?main(t+1,_,a):3,main(-94,-27+t,a)&&t==2?_<13?
- main(2,_+1,"%s %d %d\n"):9:16:t<0?t<-72?main(_,t,
- "@n'+,#'/*{}w+/w#cdnr/+,{}r/*de}+,/*{*+,/w{%+,/w#q#n+,/#{l+,/n{n+,/+#n+,/#\
- ;#q#n+,/+k#;*+,/'r :'d*'3,}{w+K w'K:'+}e#';dq#'l \
- q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;# \
- ){nl]!/n{n#'; r{#w'r nc{nl]'/#{l,+'K {rw' iK{;[{nl]'/w#q#n'wk nw' \
- iwk{KK{nl]!/w{%'l##w#' i; :{nl]'/*{q#'ld;r'}{nlwb!/*de}'c \
- ;;{nl'-{}rw]'/+,}##'*}#nc,',#nw]'/+kd'+e}+;#'rdq#w! nr'/ ') }+}{rl#'{n' ')# \
- }'+}##(!!/")
- :t<-50?_==*a?putchar(31[a]):main(-65,_,a+1):main((*a=='/')+t,_,a+1)
- :0<t?main(2,2,"%s"):*a=='/'||main(0,main(-61,*a,
- "!ek;dc i@bK'(q)-[w]*%n+r3#l,{}:\nuwloca-O;m .vpbks,fxntdCeghiry"),a+1);}
我试着在GCC下编译以下，居然通过了。而且成功地输出的结果：
- On the first day of Christmas my true love gave to me
- a partridge in a pear tree.
- On the second day of Christmas my true love gave to me
- two turtle doves
- and a partridge in a pear tree.
- On the third day of Christmas my true love gave to me
- three french hens, two turtle doves
- and a partridge in a pear tree.
- On the fourth day of Christmas my true love gave to me
- four calling birds, three french hens, two turtle doves
- and a partridge in a pear tree.
- On the fifth day of Christmas my true love gave to me
- five gold rings;
- four calling birds, three french hens, two turtle doves
- and a partridge in a pear tree.
- On the sixth day of Christmas my true love gave to me
- six geese a-laying, five gold rings;
- four calling birds, three french hens, two turtle doves
- and a partridge in a pear tree.
- On the seventh day of Christmas my true love gave to me
- seven swans a-swimming,
- six geese a-laying, five gold rings;
- four calling birds, three french hens, two turtle doves
- and a partridge in a pear tree.
- On the eigth day of Christmas my true love gave to me
- eight maids a-milking, seven swans a-swimming,
- six geese a-laying, five gold rings;
- four calling birds, three french hens, two turtle doves
- and a partridge in a pear tree.
- On the ninth day of Christmas my true love gave to me
- nine ladies dancing, eight maids a-milking, seven swans a-swimming,
- six geese a-laying, five gold rings;
- four calling birds, three french hens, two turtle doves
- and a partridge in a pear tree.
- On the tenth day of Christmas my true love gave to me
- ten lords a-leaping,
- nine ladies dancing, eight maids a-milking, seven swans a-swimming,
- six geese a-laying, five gold rings;
- four calling birds, three french hens, two turtle doves
- and a partridge in a pear tree.
- On the eleventh day of Christmas my true love gave to me
- eleven pipers piping, ten lords a-leaping,
- nine ladies dancing, eight maids a-milking, seven swans a-swimming,
- six geese a-laying, five gold rings;
- four calling birds, three french hens, two turtle doves
- and a partridge in a pear tree.
- On the twelfth day of Christmas my true love gave to me
- twelve drummers drumming, eleven pipers piping, ten lords a-leaping,
- nine ladies dancing, eight maids a-milking, seven swans a-swimming,
- six geese a-laying, five gold rings;
- four calling birds, three french hens, two turtle doves
- and a partridge in a pear tree.
Tags: programming
