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Message: [QUOTE="Malcolm McLean, post: 4031610"] In qsort,no. The function takes two size_ts, one giving element width in bytes, which is where you'd expect a size_t, the other giving the number of elements, which we would expect to be an int. The justification is that int may not be big enough to index an entire array. This could happen a) if int is the address size of the processor, and the array is an array of chars taking up more than half of memory, or b) if int is smaller than the address space of the machine. a) is so unlikely that we can ignore it. b) can happen if int is not 64 bits on a machine with a 64 bit address space. [/QUOTE]