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more readable code, better testcase

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This commit is contained in:
Joshua Moerman 2011-10-21 18:04:17 +02:00
parent 2420a8c61a
commit b210eb3d81
2 changed files with 17 additions and 9 deletions
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15
brainfuck/brainfuck.hpp
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@ -13,12 +13,17 @@ namespace brainfuck_details {
template <typename T, typename InputIterator, typename OutputIterator> template <typename T, typename InputIterator, typename OutputIterator>
void b(char * c, InputIterator& in, T * & p, OutputIterator out){ void b(char * c, InputIterator& in, T * & p, OutputIterator out){
for(; *c && *c != ']'; ++c) { for(; *c && *c != ']'; ++c) {
(*((p+=*c=='>')-=*c=='<')+=*c=='+') -=*c=='-'; switch(*c){
if(*c=='.') *out++ = *p; case '>' : ++p; break;
if(*c==',') *p = *in++; case '<' : --p; break;
if(*c=='[') { case '+' : ++*p; break;
case '-' : --*p; break;
case '.' : *out++ = *p; break;
case ',' : *p = *in++; break;
case '[' :
for(++c; *p;) b(c, in, p, out); for(++c; *p;) b(c, in, p, out);
for(int d=0; *c!=']'||d--; ++c)d+=*c=='['; for(int d = 0; *c!=']' || d--; ++c) if(*c == '[') d++;
break;
} }
} }
} }

7
brainfuck/main.cpp
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@ -4,8 +4,11 @@
#include "brainfuck.hpp" #include "brainfuck.hpp"
int main() { int main() {
brainfuck<int>("+[,.]", std::istream_iterator<int>(std::cin)); // will print "Hello World", or something like that.
brainfuck<int>(">++++++++++++++++++++++++++++++++>+>+[[+++++[>++++++++<-]>.<++++++[>--------<-]+<<<]>.>>[[-]<[>+<-]>>[<<+>+>-]<[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>[-]>+>+<<<-[>+<-]]]]]]]]]]]+>>>]<<<]"); brainfuck("++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.");
// will print the fibonacci sequence
brainfuck(">++++++++++++++++++++++++++++++++>+>+[[+++++[>++++++++<-]>.<++++++[>--------<-]+<<<]>.>>[[-]<[>+<-]>>[<<+>+>-]<[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>[-]>+>+<<<-[>+<-]]]]]]]]]]]+>>>]<<<]");
return 0; return 0;
} }