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Dec 30, 2011 · You can get the bytes by using some pointer arithmetic: int x = 12578329; // 0xBFEE19. for (size_t i = 0; i < sizeof(x); ++i) {. // Convert to unsigned char* because a char is 1 byte in size. // That is guaranteed by the standard. // Note that is it NOT required to be 8 bits in size. unsigned char byte = *((unsigned char *)&x + i);
Mar 8, 2012 · Agree with Andrew Marshall the value returned is bytes not bits and I don't believe the standard allows bits as the defined unit size that will be returned, the size of storage for a pointer is typically the same as the size on an int which is defined as what the operating system can efficiently store and guaranteed to be at least as large as this so typically 4 bytes (32 bits) or 8 bytes (64 ...
Jul 25, 2018 · C/C++ has very loose definitions on its basic integer data types (char, short, int, long, and long long). The language guarantees that they can represent at least some range of values, but any particular platform (compiler, operating system, hardware) might be larger than that.A good example is long. On one machine, it might be 32 bits (the minimum
- Integer Data Type
- Character Data Type
- Float Data Type
- Double Data Type
- Void Data Type
- Size of Data Types in C
The integer datatype in C is used to store the integer numbers (any number including positive, negative and zero without decimal part). Octal values, hexadecimal values, and decimal values can be stored in int data type in C. 1. Range: -2,147,483,648 to 2,147,483,647 2. Size:4 bytes 3. Format Specifier:%d
Character data type allows its variable to store only a single character. The size of the character is 1 byte. It is the most basic data type in C. It stores a single character and requires a single byte of memory in almost all compilers. 1. Range: (-128 to 127) or (0 to 255) 2. Size:1 byte 3. Format Specifier:%c
In C programming float data typeis used to store floating-point values. Float in C is used to store decimal and exponential values. It is used to store decimal numbers (numbers with floating point values) with single precision. 1. Range: 1.2E-38 to 3.4E+38 2. Size:4 bytes 3. Format Specifier:%f
A Double data typein C is used to store decimal numbers (numbers with floating point values) with double precision. It is used to define numeric values which hold numbers with decimal values in C. The double data type is basically a precision sort of data type that is capable of holding 64 bits of decimal numbers or floating points. Since double ha...
The void data type in C is used to specify that no value is present. It does not provide a result value to its caller. It has no values and no operations. It is used to represent nothing. Void is used in multiple ways as function return type, function arguments as void, and pointers to void.
The size of the data types in C is dependent on the size of the architecture, so we cannot define the universal size of the data types. For that, the C language provides the sizeof() operator to check the size of the data types.
Storage (GNU C Language Manual) 3 Storage and Data. Storage in C programs is made up of units called bytes. A byte is the smallest unit of storage that can be used in a first-class manner. On nearly all computers, a byte consists of 8 bits. There are a few peculiar computers (mostly “embedded controllers” for very small systems) where a ...
3 days ago · Setting a bit means setting its value to 1. In C, we can set a given bit using the OR operator (|) combined with a bit mask. Below is the truth table of OR: From the above table, we can infer that: By ORing a bit with 1, the given bit is set to 1. By ORing a bit with 0, the given bit remains unchanged.
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We normally read, write, and think about numbers in base 10 (decimal), but machines compute and store numbers in base 2 (binary). So in C code, when we write "6" or "11", we are actually expressing the bit values 110 and 1011. C also lets us write numbers in octal and hexadecimal notation, whose digits neatly map to binary digits.
