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I have 2 forms which actually output different results which I dont understand
int x = *(int*)&M[index]
compared to
int x = (int)M[index]
Can someone explain to me what is the difference?
If the datatype of M is not int[], they may differ, take the case where you have an array of 2 (16 bit) shorts, 0x0123 and 0x4567. The memory layout (big endian) would/may be;
In the latter case with M[0], you’d assign the short correctly to the integer since you’d read M[0] and convert it to an integer, 0x00000123
In the first case you’d take the address of M[0] and assume that what’s in memory there is an integer, that’d with a 32 bit integer type give the result 0x01234567 (ie all 4 bytes would be read)