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I came across this syntax which i have not seen before
struct A {
int x:24;
};
What does x:24 mean ? In C++ can you specify compiler that a variable should occupy only 24 bits, instead of 32 for an int type? If yes, which 24 bits will be occupied? the left most or the right most?
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There are two types of variable-length data types. These are real variable-length data types, like char and binary, and nullable data types, which have either a normal fixed length that corresponds to their type or to a special length if null.
The size of float (single precision float data type) is 4 bytes. And the size of double (double precision float data type) is 8 bytes.
In the above example, '@' and '23' are also of type str (str is for String). Look at another example. You can see that the data type of the value assigned to a is str because it is written within "" . Even a digit written within ' ' or " " is treated as a string and not as an integer or a float.
This is the bit fields feature. It has been available since the early C days. Microsoft has a nice write-up on this feature, complete with pretty pictures showing the layout which is compiler-specific (they say that the pic is specific to MS).
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