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author | nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> |
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date | Mon, 09 May 2011 03:11:59 +0900 |
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#include <iostream> #include "node.h" int cnode::expr(std::map<std::string, int> &values) const { switch (op_) { case OP_NEG: return -left_->expr(values); case OP_PLUS: return left_->expr(values) + right_->expr(values); case OP_MINUS: return left_->expr(values) - right_->expr(values); case OP_TIMES: return left_->expr(values) * right_->expr(values); case OP_DIVIDE: return left_->expr(values) / right_->expr(values); case OP_NUMBER: return number_; case OP_IDENT: return values[string_]; default: return 0; // error } }