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Apr 4, 2010 · Instead you use this (*ptr).kg and you force compiler to 1st dereference the pointer and enable acess to the chunk of data and 2nd you add an offset (designator) to choose the member. Check this image I made: But if you would have nested members this syntax would become unreadable and therefore -> was introduced.
Apr 3, 2018 · The & operator performs a bit-wise and operation on its integer operands, producing an integer result. Thus (8 & 4) is (0b00001000 bitand 0b00000100) (using a binary notation that does not exist in standard C, for clarity), which results in 0b00000000 or 0. The && operator performs a logical and operation on its boolean operands, producing a ...
Also note that C and C++ do not distinguish between the right shift operators. They provide only the >> operator, and the right-shifting behavior is implementation defined for signed types. The rest of the answer uses the C# / Java operators. (In all mainstream C and C++ implementations including GCC and Clang/LLVM, >> on signed types is ...
Jan 17, 2020 · The ~ operator in C++ (and other C-like languages like C and Java) performs a bitwise NOT operation - all the 1 bits in the operand are set to 0 and all the 0 bits in the operand are set to 1. In other words, it creates the complement of the original number. For example:
Just to save future generations on any confusion here. It is the "conditional operator". It just happens to be a ternary operator, of which there is only one in C and C++. There are lots of unary (~, !, -) and binary (+, -, <<) operators in C/C++ as well. Neato! –
In modern C, or even moderately ancient C, += is a compound assignment operator, and =+ is parsed as two separate tokens. = and +. Punctuation tokens are allowed to be adjacent. So if you write: x += y; it's equivalent to. x = x + y; except that x is only evaluated once (which can matter if it's a more complicated expression).
Aug 29, 2008 · Good question. These two operators work the same in PHP and C#. | is a bitwise OR. It will compare two values by their bits. E.g. 1101 | 0010 = 1111. This is extremely useful when using bit options. E.g. Read = 01 (0X01) Write = 10 (0X02) Read-Write = 11 (0X03). One useful example would be opening files.
Jan 2, 2021 · 32. It is the XOR assignment operator. Basically: is the same as: This, of course, assumes the ^= operator hasn't been overloaded to who knows what. :-) Also you should point out that its not just part of the C [++] language but its within many languages.
Mar 30, 2011 · 3. The * in declaration means that the variable is a pointer to some other variable / constant. meaning it can hold the address of variable of the type. for example: char *c; means that c can hold the address to some char, while int *b means b can hold the address of some int, the type of the reference is important, since in pointers arithmetic ...
Mar 30, 2023 · 135. Dereferencing a pointer means getting the value that is stored in the memory location pointed by the pointer. The operator * is used to do this, and is called the dereferencing operator. int a = 10; int* ptr = &a; printf("%d", *ptr); // With *ptr I'm dereferencing the pointer.
