Main TopicsDoes references exist in C?
Does references exist in C?
No, it doesn't. It has pointers, but they're not quite the same thing. For more details about the differences between pointers and references, see this SO question.
What are references in C?
When a variable is declared as a reference, it becomes an alternative name for an existing variable. A variable can be declared as a reference by putting '&' in the declaration.
Can C++ references be null?
References cannot be null, whereas pointers can; every reference refers to some object, although it may or may not be valid.
What is enum in C?
Enumeration (or enum) is a user defined data type in C. It is mainly used to assign names to integral constants, the names make a program easy to read and maintain.
What is argument in C?
An argument is referred to the values that are passed within a function when the function is called. These values are generally the source of the function that require the arguments during the process of execution. These values are assigned to the variables in the definition of the function that is called.
IS NULL == nullptr?
NULL is 0 (zero) i.e. integer constant zero with C-style typecast to void* , while nullptr is prvalue of type nullptr_t , which is an integer literal that evaluates to zero. For those of you who believe that NULL is the same i.e. (void*)0 in C and C++.
What is use of enum in C?
CProgrammingServer Side Programming. Enumeration is a user defined datatype in C language. It is used to assign names to the integral constants which makes a program easy to read and maintain. The keyword “enum” is used to declare an enumeration.
How big is an enum in C?
On an 8-bit processor, enums can be 16-bits wide. On a 32-bit processor they can be 32-bits wide or more or less. The GCC C compiler will allocate enough memory for an enum to hold any of the values that you have declared. So, if your code only uses values below 256, your enum should be 8 bits wide.
