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September 26th, 2018, 08:19 AM
#10
Re: Why am I printing more characters that i expect?
With c++17, the pointer returned by .data() is now non-const so the memory referenced by .data() can be altered. The string constructor creates a string of at least the required size so the .read() will happily read the contents of the file into the string memory. Note this is c++17. Previous c++ standards have .data() returning a const pointer so the string memory can't (shouldn't) be altered like this.
All advice is offered in good faith only. All my code is tested (unless stated explicitly otherwise) with the latest version of Microsoft Visual Studio (using the supported features of the latest standard) and is offered as examples only - not as production quality. I cannot offer advice regarding any other c/c++ compiler/IDE or incompatibilities with VS. You are ultimately responsible for the effects of your programs and the integrity of the machines they run on. Anything I post, code snippets, advice, etc is licensed as Public Domain https://creativecommons.org/publicdomain/zero/1.0/ and can be used without reference or acknowledgement. Also note that I only provide advice and guidance via the forums - and not via private messages!
C++23 Compiler: Microsoft VS2022 (17.6.5)
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