Declarations and Initializations

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.

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