Merge pull request #1 from Pactivsa/master

公式解析计算

Author: kuzuanpa

src/main/java/cn/kuzuanpa/formulaParser/formulaParser.java

@@ -0,0 +1,22 @@
+package cn.kuzuanpa.ktfruaddon.code.formulaParser;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+public class formulaParser {
+
+    private final HashMap<String,Double> variables;
+    public formulaParser(HashMap<String,Double> variables) {
+        this.variables = variables;
+    }
+    public formulaParser(){
+        this.variables = new HashMap<>();
+    }
+    public double eval(String str) {
+        //分词
+        ArrayList<tokenizer.Token> tokens = tokenizer.tokenize(str);
+        //解析
+        parser m_parser = new parser(this.variables);
+        //输出运算结果
+        return m_parser.parse(tokens);
+    }
+}