Why do I get: -9223372036854775808

The one glaring error is this: Since maxPower is 50, you are accessing an element that’s out of bounds. This is undefined behavior Also, to make the code legal C++, either declare an array of 50: or declare a std::vector<int64_t>. When you do that and use at() instead of [], then you get a better view of how your program breaks. See the … Read more

C++ equivalent of StringBuffer/StringBuilder?

The C++ way would be to use std::stringstream or just plain string concatenations. C++ strings are mutable so the performance considerations of concatenation are less of a concern. with regards to formatting, you can do all the same formatting on a stream, but in a different way, similar to cout. or you can use a strongly typed functor which … Read more

Declare a bit in C++

There is none. The smallest addressable entity is a byte. This is the char or unsigned char type. (The best type is the integer because it is aligned to the width of your processor and thus fastest to fetch and work on) To work with bits you need to use boolean operators and mask/shift your … Read more

Negative RGB Values

A possible reason for 8-bit signed values for pixel calculation comes from the necessity to represent RGB colors in YUV, YCrCb or other modes with chrominance. The Chrominance channels are encoded as differences in Green-Blue and Green-Red or Green-Yellow, Red-Blue etc. to simplify the answer. This range has also negative values.

How to determine the version of the C++ standard used by the compiler?

By my knowledge there is no overall way to do this. If you look at the headers of cross platform/multiple compiler supporting libraries you’ll always find a lot of defines that use compiler specific constructs to determine such things: You probably will have to do such defines yourself for all compilers you use.

How to determine the version of the C++ standard used by the compiler?

By my knowledge there is no overall way to do this. If you look at the headers of cross platform/multiple compiler supporting libraries you’ll always find a lot of defines that use compiler specific constructs to determine such things: You probably will have to do such defines yourself for all compilers you use.

Dynamic and static Scoping program differences

Static scoping means that x refers to the x declared innermost scope of declaration that has one. Since h is declared inside the global scope, the innermost x is the one in the global scope(it has no access to the xs in f and g, since it was not declared inside them), so the program prints 14 twice. Dynamic scoping means that x refers to the x declared in the most recent frame of the call-stack the … Read more

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