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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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// // ノードクラス // // Chihiro.SAKAMOTO // #include "node.h" #include "calc-driver.h" int cnode::expr(calc_driver *driver) const { switch (op_) { case OP_PLUS: return left_->expr(driver) + right_->expr(driver); case OP_MINUS: return left_->expr(driver) - right_->expr(driver); case OP_TIMES: return left_->expr(driver) * right_->expr(driver); case OP_DIVIDE: return left_->expr(driver) / right_->expr(driver); case OP_CONST: return value_; case OP_VALUE: return driver->value(string_); case OP_NEG: return -left_->expr(driver); default: return 0; // error } }