Do formal parameters occupy storage units in C language?

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Release: 2024-05-07 07:30:22
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Yes, formal parameters occupy storage units in C language. Detailed description: 1. Formal parameters allocate storage units in the function stack frame. 2. The actual parameter value is copied to the formal parameter storage location. 3. Modifying the formal parameters will not affect the actual parameters.

Do formal parameters occupy storage units in C language?

Do formal parameters occupy storage units in C language?

Yes, formal parameters occupy storage units in C language.

Detailed description:

Formal parameters are variables that receive actual parameters (actual parameters) in the function definition. When a function is called, storage locations are allocated for formal parameters to store the corresponding actual parameter values. These storage locations are allocated within the function stack frame.

The function stack frame is a temporary memory area that is created when the function is called and destroyed when the function returns. The stack frame stores function local variables, formal parameters, and function return addresses.

Each formal parameter is allocated a storage unit corresponding to its actual type in the stack frame. For example, an integer parameter will allocate a 4-byte storage location, while a character parameter will allocate a 1-byte storage location.

The value of the actual parameter is copied to the storage unit of the formal parameter. This means that modifications to the formal parameters do not affect the actual parameters themselves. Instead, modifications to actual parameters need to be passed to the function through a pointer or reference passing mechanism.

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