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dandy7219-Feb-20 6:09
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General2 Dim arrays in Java Pin
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Member 798912218-Feb-20 22:55
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In C/C++, you cannnot do much decent programming if you are not aware of the array name as a pointer.

E.g. in Pascal, if you declare an array summerMonths: array[may..agust] of travelPlans; then you wouldn't care if 'summerMonths' is the address of element 'may' and actual indexes reduced by four before multiplied by the element size to get the element offset, or 'summerMonths' is the element of the (non-existing) 'january' element so that actual indexes may be directly multiplied by the element size to get the element offset. I believe that the Pascal standard says nothing about the implementation, and the compiler could do it either way. At least in the "original" Pascal that wasn't made for linking with modules in other languages. Maybe some external interface specification defines which address (of a non-existing elment 0 or of the first existing element) is transferred, to make the C programmers comfortable Smile | :)

None of that affects the Pascal code, though. You address summerMonth[july] as one of four travelPlans objects, without knowing what its address is and how it was calculated. Why would you care? In C/C++ you more or less have to care.

When using C for writing machine code, e.g bottom layer drivers, where the task by definition relates to physical addresses, controlling the exact binary code emitted by the compiler, you of course have to know. Pascal wasn't meant for those kind of tasks. My guess is that well above 99% of all C/C++ code written is not at that low level either, and actual physical addresses are not relevant. Yet, because of that fraction of a percent, all C/C++ programmers must be aware of the array as a pointer, indexing as a kind of pointer arithmetic etc.

If I work at that bottom level, interfacing directly to harware, I appreciate C. For higher levels, user applications in particular, I prefer languages that does not give me the freedom of C, and that relieves me from knowing which addresses are generated by the compiler.
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