Question

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

Answer 1

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

Answer:-
Both 1 and 3 are declarations.

extern int x; is external variable declaration

2 is definition

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

Hope it helps

Answer 2

Explanation:

In the following program where is the variable a getting defined and where it is getting declared?

#include int main() { extern int a; printf("%d\n", a); return 0; } int a=20; A. extern int a is declaration, int a = 20 is the definitionB. int a = 20 is declaration, extern int a is the definitionC. int a = 20 is definition, a is not definedD. a is declared, a is not defined