Update a1/program.c

a1/program.c

@@ -50,7 +50,7 @@ int main() {
             }
             if (!isMatching(stack[top], current)) {
                 char expected = expectedClosing(stack[top]);
-                printf("Crossed bracket '%c' in %d, expected '%c'\n", current, i, expected);
+                printf("Crossed bracket %c in %d, expected %c\n", current, i, expected);
                 return 0;
             }
             top--;