What is the way C language passes arguments between actual parameters and formal parameters?

In the C language, there are two ways to pass arguments to parameters: by value and by address.

  1. Passing by value: When a function is called, a copy of the actual parameter’s value is passed to the formal parameter. The operations on the formal parameter inside the function will not affect the value of the actual parameter. This passing method is suitable for basic data types (such as int, char, etc.) as well as smaller data types like structures and arrays.
  2. Pass by reference: When a function is called, the address of the actual parameter is passed, and any operations on the formal parameter inside the function will directly affect the value of the actual parameter. This passing method is suitable for large data structures, dynamic memory allocation, etc., as it can reduce the overhead of copying data and improve the efficiency of the program.
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