fixed error caused by negative number for St instruction

QtpyeRose · Apr 4, 2021 · ad8a07c · ad8a07c
1 parent c0ebfef
commit ad8a07c
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/ndballsim/Parser.java b/src/ndballsim/Parser.java
@@ -414,6 +414,9 @@ public static Instr[] parse(String file, boolean unlimit) {
                                 error(lineNum, "String instruction requires a ending \"]\"  ex. St[num]");
                             }
                             try {
+                                if( Integer.parseInt(line.substring(3, line.length() - 1)) < 0){
+                                    error(lineNum, "String instruction only accepts non-negative numbers");
+                                }
                                 list.add(new Instr(pos, "St", Integer.parseInt(line.substring(3, line.length() - 1))));
                             } catch (NumberFormatException e) {
                                 //was not a number