How to solve the issue of failed parameter passing in the C language function?

If passing parameters in a C language function fails, there might be several possible solutions available.

1. Check parameter types: Ensure that the types of parameters in a function match the types of parameters provided when calling the function. For example, if a function expects an integer parameter but is provided with a string parameter when called, it will result in a parameter failure.
2. Check parameter quantity: Make sure the number of parameters in the function matches the number of parameters provided when calling the function. Providing only 2 parameters when the function expects 3 will also result in a parameter failure.
3. Check pointer parameters: If the function’s parameter is a pointer type, ensure that the passed pointer points to valid memory space. Passing a NULL pointer or a pointer pointing to unallocated memory will result in parameter failure.
4. Check function definitions and declarations: make sure they are consistent. If a function is not declared before being called, the compiler may default parameters to integers without performing type checking. Adding a function declaration before defining it can resolve this issue.
5. Check the return value of the function: If the return value type of the function does not match the type expected when calling the function, it will result in parameter failure. Make sure the return value type of the function matches the expected type when calling the function.
6. Check the function call location: If the function is defined after the function call, the compiler may not be able to find the function’s definition, leading to parameter passing failure. Placing the function definition before the function call can solve this issue.

If none of the above solutions can fix the issue of parameter passing failure, it may be due to a logic error in the code, and further inspection of other parts of the code is necessary.