why C++'s grammar has wrong here

src/client/src/tscServer.c

@@ -1537,17 +1537,9 @@ int tscBuildCreateTableMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
       //what pCreate->tableName point is a fixed char array which size is 237
       //what p->fullname point is a char*
       //before the time we copy p->fullname to pCreate->tableName , we need to check the length of p->fullname
-      try {
-          if (strlen(p->fullname) > 237) {
-            throw runtime_error("length of fullname should be less than 237");
-          }
-      }
-      catch (runtime_error err) {
-          cout << err.what() <<"\nMay you can reenter"<< endl;
-    
-          while (strlen(p->fullname) > 237) {
-              scanf("%s", p->fullname);
-          }
+      while (strlen(p->fullname) > 237) {
+          print("length of p->fullname should not exced 237\n");
+          scanf("%s", p->fullname);
       }
       strcpy(pCreate->tableName, p->fullname);
       pCreate->igExists = (p->igExist)? 1 : 0;