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How many bytes are read in pointers by pointers dereferencing?
When you dereference a pointer you "read" the number of bytes determined by the pointer's type. That is, a char pointer dereferences a single byte while an int pointer dereferences 4 bytes (assuming a 32-bit int) -- regardless of the type actually stored at that address. However, note that a pointer can only actually point at a single byte since it only has storage for a single memory address. How many additional bytes are dereferenced is entirely dependant on the type of the pointer. To determine how many bytes are actually allocated to an address, use the sizeof operator, passing a dereferenced pointer (the pointer must point at the start of the allocation). If the pointer points at several elements of the same type (an array), then divide the total bytes by the size of the pointer's type to determine the number of elements in the array.
How many bytes are required to store the pointer?
It depends on the platform... In a 16 bit environment, such as DOS or Windows 3.x, a near pointer is two bytes, while a far pointer is 4 bytes. In a 32 bit environment, such as Win32, a pointer is 4 bytes. In a 64 bit environment, such as Win64, a pointer is 8 bytes. If you want to find out in your particular environment, look at sizeof(ptr), where ptr is declared as a pointer to something. char* ptr; std::cout << sizeof(ptr) << std::endl; Note that the size of the pointer is not the same as the size of the object to which it points. If you looked at sizeof(*ptr), you would get 1.
How many bytes required for int float double char boolean?
Int: 4 bytes Float: 4 double: 8 char: 1 boolean: 1
How many bytes are used to store a 64-bit number?
how many bytes are there in a 64-bit machine? Another Answer: It takes 8 bytes to store a 64 bit number.
How many bytes does an Boolean take in a c program?
There is no boolean in C, we usually use int/short/char to store logical values.
How many bytes are read in pointers by pointers dereferencing?
When you dereference a pointer you "read" the number of bytes determined by the pointer's type. That is, a char pointer dereferences a single byte while an int pointer dereferences 4 bytes (assuming a 32-bit int) -- regardless of the type actually stored at that address. However, note that a pointer can only actually point at a single byte since it only has storage for a single memory address. How many additional bytes are dereferenced is entirely dependant on the type of the pointer. To determine how many bytes are actually allocated to an address, use the sizeof operator, passing a dereferenced pointer (the pointer must point at the start of the allocation). If the pointer points at several elements of the same type (an array), then divide the total bytes by the size of the pointer's type to determine the number of elements in the array.
How many bytes are required to store the pointer?
It depends on the platform... In a 16 bit environment, such as DOS or Windows 3.x, a near pointer is two bytes, while a far pointer is 4 bytes. In a 32 bit environment, such as Win32, a pointer is 4 bytes. In a 64 bit environment, such as Win64, a pointer is 8 bytes. If you want to find out in your particular environment, look at sizeof(ptr), where ptr is declared as a pointer to something. char* ptr; std::cout << sizeof(ptr) << std::endl; Note that the size of the pointer is not the same as the size of the object to which it points. If you looked at sizeof(*ptr), you would get 1.
How many bytes required for int float double char boolean?
Int: 4 bytes Float: 4 double: 8 char: 1 boolean: 1
How many bytes does float double long string and char store?
float usually 4 double usually 8 long is 8 but integer, unlike double string is a pointer to a memory address containing array of chars, so it doesn't have a fixed size and a char is usually 1, but i think its 2 in java
How many bytes in a pointer address?
Suppose that we're talking about C on an x86 32-bit processor it should be 4-bytes (32-bits). Since the pointer has to be able to hold any memory location it should be the same number of bits as the processor.
How many bytes takes on integer in windows and Linux?
Usually four bytes.
How many types of pointers are there?
That depends on what you consider a type. A pointer variable simply stores a memory address or NULL so, strictly speaking, there is only one type of pointer. A pointer variable's type (int *, char *, void *, etc) determines the type that a pointer points to, not the type of the pointer itself. Whether a pointer points to a primitive type, a user-defined type, a function, another pointer or void, makes no difference to the pointer variable itself. It simply stores a memory address. How you treat that memory address is determined by the pointer variable's type. So, in that respect, there are as many types of pointer as there are types to point at; which would be infinite. The architecture determines the size of a pointer variable. On a 16-bit system, a pointer will occupy just 2 bytes, while on a 32-bit system it occupies 4 bytes and 8 bytes on a 64-bit system. Although these may be considered separate pointer types, you can't pick and choose which type you use. The size must be consistent for any given architecture, hence the prevalent use of the sizeof() operator to determine a variable's length at runtime.
How many bytes are used to store a 64-bit number?
how many bytes are there in a 64-bit machine? Another Answer: It takes 8 bytes to store a 64 bit number.
How many bytes does an Boolean take in a c program?
There is no boolean in C, we usually use int/short/char to store logical values.
How many type of pointer in c?
A pointer is a pointer to something else. One way to look at it is that there is only one pointer type - an address to something else. Another way to look at it is to see how many different types there are, such as int, char, float, struct, double, etc. and to realize that you can build a pointer to any of them, as well as a pointer to a pointer to any of them, etc., etc., etc. Bottom line, is there are an unlimited number of types of pointers.
How many bytes are used to store a 64 bit number?
how many bytes are there in a 64-bit machine? Another Answer: It takes 8 bytes to store a 64 bit number.
How many bytes is an integer variable?
It depends on the context. Each database and computer language define an "integer". In the C language an integer is defined by the hardware. It can vary from 2 to 8 bytes or more.
