What if statement does a dangling else belong to?

The dangling else is a problem in programming of parser generators in which an optional else clause in an if–then(–else) statement results in nested conditionals being ambiguous. Formally, the reference context-free grammar of the language is ambiguous, meaning there is more than one correct parse tree.

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 else in C++?

In C++ it is possible to leave out the braces in an if condition or while loop. One danger of not writing braces is the so-called dangling else problem. The dangling else problem results when a programmer believes (or forgets) the code indentation and loses track of the if statement that goes with the else statement.

Does left factoring remove ambiguity?

2 Answers. In the case of the dangling else, ambiguity is not eliminated by left factoring. You will still have two parse trees for nested if statements. This is exactly what left factoring usually refers to.

Which statement in C program should end with?

All C statement must end with a semicolon.

How do I override the default dangling else matching?

the problem so called is dangling else . It can be overcome by the use of braces.

How left recursion is diff from left factoring?

Left Factoring is a grammar transformation technique. It consists in “factoring out” prefixes which are common to two or more productions. Left Recursion is a property a grammar has whenever you can derive from a given variable (non terminal) a rhs that begins with the same variable, in one or more steps.

How do I remove left recursion& Left factoring from grammar?

Elimination of Left Recursion Left recursion is eliminated by converting the grammar into a right recursive grammar.

How can dangling pointers be prevented?

The dangling pointer errors can be avoided by initializing the pointer to the NULL value. If we assign the NULL value to the pointer, then the pointer will not point to the de-allocated memory. Assigning NULL value to the pointer means that the pointer is not pointing to any memory location.

How can we overcome the issue of dangling reference in a program?

We can avoid the dangling pointer errors by initialize pointer to NULL , after de-allocating memory, so that pointer will be no longer dangling. Assigning NULL value means pointer is not pointing to any memory location.

Which statement is used to terminate the program?

The end statement statement is used to terminate the program. Explanation: The end statement is the last line of the program or function.