expected primary-expression

"Expected primary-expression" is a common error message in programming languages such as C++, Java, and Python. It means that the compiler or interpreter expected to find a valid primary expression in a particular part of the code, but instead found something that was not a primary expression or was missing a required component.

A primary expression is a basic unit of code that can stand on its own and has a value. Examples of primary expressions include literals (e.g. numbers or strings), variables, function calls, and parentheses expressions.

Some common causes of "expected primary-expression" errors include:

- Forgetting to include parentheses around function arguments
- Mismatched or missing quotes around string literals
- Using an incorrect syntax for an operator or function call
- Using a variable or function that has not been declared or defined
- Forgetting to include a required header file or import statement

To resolve this error, you will need to carefully review the code and ensure that all primary expressions are properly formed and used in the correct context.