Project 2b: Error Handling

  1. C-- code

    int main() {
  int x;
  int y;
  
  x = 0
  y = 5;

  while (x < y) {
    write x
    writeln;
    x = x + * 1;
  }
}

    Parser output

    Error on line 6: expected semi, but found id
Error on line 10: expected semi, but found writeln
Error on line 11: invalid expression
Parser found 3 errors.

  2. C-- code

    int x;

int double(int y) {
  return 2*y;
}

int main() {
  read x;
  write double(x);
  return 1

    Parser output

    Error on line 12: expected semi, but found done
Error on line 12: unexpected end of file, missing closing brace
Parser found 2 errors.

  3. C-- code

    int x;

int double(int y) {
  return 2*y;

int main() {
  read x;
  write double(x);
  return 1;
}

    Parser output

    Error on line 7: invalid expression
Error on line 7: unexpected end of function, missing closing brace
Parser found 2 errors.

  4. C-- code

    int x;
char ;

int main() {
    x = 10;
    y = 'a';
    write x;
    write y;
}

    Parser output

    Error on line 2: missing identifier in declaration
Parser found 1 error.

  5. C-- code

    int x;
char y

int main() {
    x = 10;
    y = 'a';
    write x;
    write y;
}

    Parser output

    Error on line 4: expected lparen, but found int
Parser found 1 error.