expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token {

This error message usually occurs when there is a syntax error in the code. It means that the compiler was expecting one of the listed tokens (‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’) but instead found an opening brace ({) without any preceding keyword or identifier.

To fix this error, you need to carefully check your code for any missing or misplaced keywords, identifiers, or semicolons. Make sure that all statements are properly terminated with a semicolon and that all opening braces are preceded by a valid keyword or identifier.

Here’s an example of how this error might occur:

int main() {
  int x, y
  {
    printf("Hello World!");
  }
  return 0;
}

In this example, there is a missing semicolon after the declaration of variables `x` and `y`. The opening brace `{` after the declaration of variables is not preceded by any valid keyword or identifier, which causes the compiler to throw the error message.

To fix this error, we can add a semicolon after the declaration of variables and remove the opening brace:

int main() {
  int x, y;
  printf("Hello World!");
  return 0;
}

This code will now compile without any errors.