fix: 修复编译中的一些小问题 (#52)

Co-authored-by: Lan_G <2911328695@qq.com>
Reviewed-on: PostGuard/Canon#52

Canon.Core/SyntaxNodes/AddOperator.cs

@@ -15,15 +15,18 @@ public class AddOperator : NonTerminatedSyntaxNode
 
     public override void GenerateCCode(CCodeBuilder builder)
     {
-        var operatorType = Children[0].Convert<TerminatedSyntaxNode>().Token.
+        var token = Children[0].Convert<TerminatedSyntaxNode>().Token;
-            Convert<OperatorSemanticToken>().OperatorType;
+        if (token.TokenType == SemanticTokenType.Operator)
-        if (operatorType == OperatorType.Plus)
         {
-            builder.AddString(" +");
+            var operatorType = token.Convert<OperatorSemanticToken>().OperatorType;
-        }
+            if (operatorType == OperatorType.Plus)
-        else if (operatorType == OperatorType.Minus)
+            {
-        {
+                builder.AddString(" +");
-            builder.AddString(" -");
+            }
+            else if (operatorType == OperatorType.Minus)
+            {
+                builder.AddString(" -");
+            }
         }
         else
         {

Canon.Core/SyntaxNodes/MultiplyOperator.cs

@@ -25,7 +25,7 @@ public class MultiplyOperator : NonTerminatedSyntaxNode
             }
             else if (operatorType == OperatorType.Divide)
             {
-                //实数除法，需要将操作数强转为float
+                //实数除法，需要将操作数强转为double
                 builder.AddString(" /(double)");
             }
         }

Canon.Core/SyntaxNodes/ProgramStruct.cs

@@ -24,7 +24,7 @@ public class ProgramStruct : NonTerminatedSyntaxNode
 
     public override void GenerateCCode(CCodeBuilder builder)
     {
-        builder.AddString("#include <PascalCoreLib.h> #include <stdbool.h>");
+        builder.AddString("#include <stdbool.h>");
         Body.GenerateCCode(builder);
     }
 }