C-language arrays do function parameters degenerate into pointers

My system is Mac OS 64 bit. There are differences depending on the number of system bits that you have. Here are some of the problems I encountered during my studies

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Sometimes we want to manipulate the elements of an array by a function, and in the Sizelen function think of the length of the arrays by sizeof.

The idea is good, don't think you know the C language very well. In fact the array in the function parameter is just passed, a pointer. That is, the array

's first address.

As you can see from the results, the C compiler did exactly that. My system is 64 bits, so int * is accounted for 8 bytes.

These are just the problems I encountered during my study. Heroes Skip ...

C-language arrays do function parameters degenerate into pointers