Search results
Results From The WOW.Com Content Network
In computer science, an integer literal is a kind of literal for an integer whose value is directly represented in source code.For example, in the assignment statement x = 1, the string 1 is an integer literal indicating the value 1, while in the statement x = 0x10 the string 0x10 is an integer literal indicating the value 16, which is represented by 10 in hexadecimal (indicated by the 0x prefix).
Information about the actual properties, such as size, of the basic arithmetic types, is provided via macro constants in two headers: <limits.h> header (climits header in C++) defines macros for integer types and <float.h> header (cfloat header in C++) defines macros for floating-point types. The actual values depend on the implementation.
A bit field is declared as a structure (or union) member of type int, signed int, unsigned int, or _Bool, [note 4] following the member name by a colon (:) and the number of bits it should occupy. The total number of bits in a single bit field must not exceed the total number of bits in its declared type (this is allowed in C++ however, where ...
int foo (int a [const]); // equivalent to int *const a int bar (char s [static 5]); // annotates that s is at least 5 chars long The functionality of compound literals in C is generalized to both built-in and user-defined types by the list initialization syntax of C++11, although with some syntactic and semantic differences.
A constant unsigned integer variable can be declared as: const unsigned int x ; where const is a type qualifier, which the qualified type of x is const unsigned int and the unqualified type is unsigned int .
In computer science, a literal is a textual representation (notation) of a value as it is written in source code. [1] [2] Almost all programming languages have notations for atomic values such as integers, floating-point numbers, and strings, and usually for Booleans and characters; some also have notations for elements of enumerated types and compound values such as arrays, records, and objects.
int num =-1; unsigned int val = 1 << num; // shifting by a negative number - undefined behavior num = 32; // or whatever number greater than 31 val = 1 << num; // the literal '1' is typed as a 32-bit integer - in this case shifting by more than 31 bits is undefined behavior num = 64; // or whatever number greater than 63 unsigned long long val2 ...
In addition to the assumption about bit-representation of floating-point numbers, the above floating-point type-punning example also violates the C language's constraints on how objects are accessed: [3] the declared type of x is float but it is read through an expression of type unsigned int.