How do you determine the actual parameters and formal parameters in C language?

In C language, the main methods for determining actual parameters and formal parameters are as follows:

1. Types and quantities of parameters: during function calls, the type and quantity of actual parameters must match the type and quantity of formal parameters in the function declaration or definition, or it will result in a compilation error.
2. There are two ways to pass parameters in C language functions: pass by value and pass by reference. When calling a function, the actual parameters should be passed based on the passing method of formal parameters in the function declaration or definition.
3. The values of arguments: the values of actual parameters will be passed to formal parameters, and within the function the values of actual parameters can be accessed through formal parameters. Therefore, when calling a function, it is important to ensure that the values of actual parameters are correctly passed to formal parameters.
4. The position of parameters: When calling a function, it is necessary to pass arguments in the order of parameters to ensure that each argument matches the corresponding parameter. Misplacing parameters may lead to errors in the parameter passing.

By using the methods mentioned above, matching between actual parameters and formal parameters can be ensured, ensuring that the function correctly receives and processes the passed parameters.