Fix String pretty-printing

1 files changed, 4 insertions, 3 deletions

diff --git a/ast.cpp b/ast.cpp
index 88d716a..68d4d4b 100644
--- a/ast.cpp
+++ b/ast.cpp
@@ -199,9 +199,10 @@ ostream& operator<<(ostream &os,const AST &ast){
 			os<<'"';
 			for(char c : ast.strval){
 				switch(c){
-					case 9: os<<"\\t"; break;
-					case 10: os<<"\\n"; break;
-					case 13: os<<"\\r"; break;
+					case '\t': os<<"\\t"; break;
+					case '\n': os<<"\\n"; break;
+					case '\r': os<<"\\r"; break;
+					case '"': os<<"\\\""; break;
 					default:
 						if(c>=32&&c<=126){
 							os<<c;