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Declarations and Initializations - Programming

Q1:

Identify which of the following are declarations
1 : extern int x;
2 : float square ( float x ) { ... }
3 : double pow(double, double);

A 1

B 2

C 1 and 3

D 3

ANS:A - 1

extern int x; - is an external variable declaration.

double pow(double, double); - is a function prototype declaration.

Therefore, 1 and 3 are declarations. 2 is definition.