国际c语言乱码大赛经典之作_c语言经典竞赛程序

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这篇是为C写的，不过作为代码阅读习惯和能力的培养，转自人牲一笑的bolg。http://apps.hi.baidu.com/share/detail/16373609 // 原始代码

#include char *a;main(int t,int _,char* a){return!0

iK{;[{nl]'/w#q#n'wk

nw'

iwk{KK{nl]!/w{%'l##w#'

nr'/ :{nl]'/*{q#'ld;r'}{nlwb!/*de}'c

;;{nl'-{}rw]'/+,}##'*}#nc,',#nw]'/+kd'+e}+;#'rdq#w!')}+}{rl#'{n' ')# }'+}##(！/“):t char *a;// can be omitted due to function field main(int t,int _,char* a){ return!0

main(-79,-13,a+main(-87,1-_,main(-86,0,a+1)+a))

, t

main(t+1,_,a)

, main(-94,-27+t,a)&&t==2 ?

main(2,_+1,”%s %d %dn“)

:16 :t

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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“)

_==*a ?

putchar(31[a])

:main(-65,_,a+1)

:main((*a=='/')+t,_,a+1)

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);} // 翻译成常规语言

// condition ? true : false;a,b,c generate step #include main(int t,int _,char* a){ // 逻辑运算优先级，便于理解 if(!0

if(t

main(-79,-13,a+main(-87,1-_,main(-86,0,a+1)+a));

else

if(t

main(t+1,_,a);

else

if(main(-94,-27+t,a)&&t==2){

if(_

return main(2,_+1,”%s %d %dn“);

else

return 9;

}else

return 16;}else{

if(t

return 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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“);

}else{

if(t

if(_==*a)

return putchar(31[a]);// pointer compile a[b] with b[a]

else

return main(-65,_,a+1);

}else{

return main((*a=='/')+t,_,a+1);

}

}else{

if(0

return main(2,2,”%s“);

else

// condition compile step a||b

return *a=='/'||

main(0,main(-61,*a,”!ek;dc i@bK'(q)-[w]*%n+r3#l,{}:nuwloca-O;m.vpbks,fxntdCeghiry“),a+1);

} } } // 除去不需要的，重构if语句 #include main(int t,int _,char* a){ if(1

if(t

main(-79,-13,a+main(-87,1-_,main(-86,0,a+1)+a));

if(t

main(t+1,_,a);

if(main(-94,-27+t,a)&&t==2){

if(_

return main(2,_+1,”%s %d %dn“);

else

return 9;

}else

return 16;}else if(t

if(t

return 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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“);

}else if(t

if(_==*a)

return putchar(a[31]);// 指针编译原理a[b]和b[a]，注意是char*

else

return main(-65,_,a+1);

}else{

return main((*a=='/')+t,_,a+1);

} }else if(0

return main(2,2,”%s“);}else{

if(!(*a=='/'))

return i@bK'(q)-[w]*%n+r3#l,{}:nuwloca-O;m.vpbks,fxntdCeghiry”),a+1);

else

main(0,main(-61,*a,“!ek;dc

return 1;// 等于(*a=='/')} } // 编译环境main入口，CRTO.C for main(__argc, __argv, _environ);// 方法的编译原来，返回值的寄存器状态 // 变量的类型转换reinterpret_cast // 使用一个新的main方法，将旧的用一个新方法'decode'表示 // 根据题设，本程序执行方式为无命令参数，即，argc==1 // 变量的声名规约，改变变量名以方便理解 // 进一步重构if语句 #include int decode(int arg1,int arg2,char* sCodec){ if(1

if(arg1

decode(-79,-13,sCodec+decode(-87,1-arg2,decode(-86,0,sCodec+1)+sCodec));

if(arg1

decode(arg1+1,arg2,sCodec);

if(decode(-94,-27+arg1,sCodec)&&arg1==2){

// 内部递归，无后续分支，可展平为递推方式

if(arg2

return decode(2,arg2+1,”%s %d %dn“);

else

return 9;

}else

return 16;}else if(arg1

// 可根据arg1范围代入。本条件代入后略

return decode(arg2,arg1,”@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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“);}else if(arg1

// 内部递归，无后续分支，可展平为递推方式

if(arg2==*sCodec)

return putchar(sCodec[31]);

else

return decode(-65,arg2,sCodec+1);}else if(arg1

// 内部递归，无后续分支，可展平为递推方式

return decode((*sCodec=='/')+arg1,arg2,sCodec+1);}else if(0

return decode(2,2,”%s“);}else{ // arg1 == 0

if(!(*sCodec=='/'))

// 内部递归，无后续分支，可展平为递推方式

return

decode(0,decode(-61,*sCodec,”!ek;dc i@bK'(q)-[w]*%n+r3#l,{}:nuwloca-O;m.vpbks,fxntdCeghiry“),sCodec+1);

else

return 1;} } int main(int argc, char* argv[], char** _environ){ return decode(argc,(int)argv,(char*)_environ);} // 分析出递归顶层返回值。

// 注意所有return的含义，9/16/1/putchar()，Non Zero-> TRUE // 分析arg1的内容，重构方法，有些坳，自己试着理解吧 #include int decode(int arg1,int arg2,char* sCodec){ if(1

if(arg1

decode(0,-86,”@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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“);

decode(1-arg2,-87,”@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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“);

decode(-13,-79,”@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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“);

}

if(arg1

decode(arg1+1,arg2,sCodec);

decode(-27+arg1,-94,”@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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“);

if(arg1==2){

while(arg2

arg2 ++;

sCodec = ”%s %d %dn“;

// 上方条件代入

if(arg1

decode(0,-86,”@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

decode(1-arg2,-87,”@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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“);

decode(-13,-79,”@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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“);

}

if(arg1

decode(arg1+1,arg2,sCodec);

decode(-27+arg1,-94,”@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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“);

}

} }else if(arg1

// 判断条件可达，取舍

char* s = sCodec;

while(!(arg2==*s)){

s ++;

}

putchar(s[31]);}else if(arg1

for(;arg1

sCodec ++;

decode(0,arg2,sCodec+1);// 条件合并 }else if(arg1 == 0){

while(!(*sCodec=='/')){

// 条件合并

decode(-61,*sCodec,”!ek;dc i@bK'(q)-[w]*%n+r3#l,{}:nuwloca-O;m.vpbks,fxntdCeghiry“);

sCodec ++;

} } return 1;// return TRUE only } int main(int argc, char* argv[], char** _environ){ decode(2,2,”%s“);return 9;} // 分析条件，重构2 #include int decode(int arg1,int arg2,char* sCodec){ if(1

if(arg1

// arg1

decode(0,-86,”@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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“);

decode(1-arg2,-87,”@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

decode(-13,-79,”@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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“);

}

if(arg1

// 1

decode(arg1+1,arg2,sCodec);

// arg1

decode(-27+arg1,-94,”@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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“);

if(arg1==2){

while(arg2

arg2 ++;

sCodec = ”%s %d %dn“;

if(arg1

decode(0,-86,”@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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“);

decode(1-arg2,-87,”@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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“);

decode(-13,-79,”@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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“);

}

if(arg1

decode(arg1+1,arg2,sCodec);

decode(-27+arg1,-94,”@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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“);

}

} }else if(arg1

// 单一条件代码组

int border =(arg1

for(;arg1

sCodec ++;

if(border)

sCodec ++;// 边界条件，注意

while(!(*sCodec=='/')){

char* s = ”!ek;dc i@bK'(q)-[w]*%n+r3#l,{}:nuwloca-O;m.vpbks,fxntdCeghiry“;

while(!(*sCodec==*s)){

s ++;

}

putchar(s[31]);

sCodec ++;

} } return 1;} int main(int argc, char* argv[], char** _environ){ decode(2,2,”%s“);return 9;} // 分析arg2代码流向，重构3 // tip.arg1 in function decode always '> 1' // the usage of arg1, arg2, sCodec.Can be omitted.#include void decode2(int arg1){ char*

sCodec

= ”@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' ')# }'+}##(！/“;int border =(arg1

for(;arg1

sCodec ++;if(border)

sCodec ++;while(!(*sCodec=='/')){

char* s = ”!ek;dc i@bK'(q)-[w]*%n+r3#l,{}:nuwloca-O;m.vpbks,fxntdCeghiry“;

while(!(*sCodec==*s)){

s ++;

}

putchar(s[31]);

sCodec ++;} } int decode(int arg1,int arg2){ // 考虑初始条件的 arg1 == 2, arg2 == 2，代码合并

// 内部递归，展平为递推方式，注意边界条件和递归嵌套的调用特点 if(arg1

decode2(0);

decode2(1-arg2);

decode2(-13);} if(arg1

decode(arg1+1,arg2);decode2(-27+arg1);if(arg1==2){

while(arg2

arg2 ++;

if(arg1

decode2(0);

decode2(1-arg2);

decode2(-13);

}

if(arg1

decode(arg1+1,arg2);

decode2(-27+arg1);

} } return 1;} int main(int argc, char* argv[], char** _environ){ decode(2,2);return 9;} // 最终结果 #include void decode2(int arg1){ char*

sCodec

for(;arg1

sCodec ++;if(border)

sCodec ++;while(!(*sCodec=='/')){

char* s = ”!ek;dc i@bK'(q)-[w]*%n+r3#l,{}:nuwloca-O;m.vpbks,fxntdCeghiry“;

while(!(*sCodec==*s)){

s ++;

}

putchar(s[31]);

sCodec ++;} } int decode(){ int arg1, arg2;for(arg2=2;arg2

decode2(0);

decode2(1-arg2);

decode2(-13);

for(arg1=arg2;arg1>=2;arg1--)

decode2(-27+arg1);} return 1;} int main(int argc, char* argv[], char** _environ){ decode();return 9;} // 额外写段代码，看一下。对照之后推一下原始代码的结果吧。#include int main(int argc, char* argv[], char** _environ){ char a[]=”@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

r{#w'r q#'+d'K#!/+k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;#){nl]!/n{n#';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' ')# }'+}##(！/“;char b[]=”!ek;dc i@bK'(q)-[w]*%n+r3#l,{}:nuwloca-O;m.vpbks,fxntdCeghiry“;for(int i=0;i

for(int j=0;j

if(a[i]==b[j]){

a[i]=b[j+31];

break;

} } printf(”%s",a);return 1;} On the /first/second/third/fourth/fifth/sixth/seventh/eigth/ninth/tenth/eleventh/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./

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