What is the problem of dangling else when does it arise?
When the number of if statement is more or less then that of else statement confusion arises in matching by the compiler.. the problem so called is dangling else . It can be overcome by the use of braces.
How is the dangling else ambiguity resolved in C ++?
Java, C and C++ have chosen to resolve the Dangling-Else ambiguity uses the following rule: An else keyword always associates with the nearest preceeding if keyword that does NOT cause a syntax error.
What is dangling pointer in C with example?
Sometimes the programmer fails to initialize the pointer with a valid address, then this type of initialized pointer is known as a dangling pointer in C. Dangling pointer occurs at the time of the object destruction when the object is deleted or de-allocated from memory without modifying the value of the pointer.
How do you remove ambiguity from grammar explain with an example?
Methods To Remove Ambiguity-
- By fixing the grammar.
- By adding grouping rules.
- By using semantics and choosing the parse that makes the most sense.
- By adding the precedence rules or other context sensitive parsing rules.
Is every C program ends with an end word?
Every C program ends with an END word. The closing brace ‘}’ of the main() in a program is the logical end of the program. 8. The purpose of the header file such as stdio.
What is meant by dangling pointer?
A dangling pointer in IT is a pointer in code that leads to the wrong memory block or to some unintended destination. In many cases, this is because the original object that the pointer is pointing to has been deleted, moved or replaced.
What are the pointers and dangling pointers?
Difference between Dangling pointer and Void pointer
| Dangling Pointer | Void Pointer |
|---|---|
| A dangling pointer is a pointer that occurs at the time when the object is de-allocated from memory without modifying the value of the pointer. | A void pointer is a pointer that can point to any data type. |
How do you remove ambiguity?
What is derivation tree in automata?
Derivation tree is a graphical representation for the derivation of the given production rules for a given CFG. It is the simple way to show how the derivation can be done to obtain some string from a given set of production rules. The derivation tree is also called a parse tree. The deepest sub-tree traversed first.
What does exit () do in C?
In the C Programming Language, the exit function calls all functions registered with atexit and terminates the program. File buffers are flushed, streams are closed, and temporary files are deleted.
What is dangling pointer in C Geeksforgeeks?
A dangling pointer is a pointer that occurs at the time when the object is de-allocated from memory without modifying the value of the pointer. A void pointer is a pointer that can point to any data type. It points to the deleted object.