#include <stdio.h> extern int var;
int main()
{ var = 10;
printf ( "%d " , var);
return 0;
} |
(A) Compiler Error: var is not defined
(B) 20
(C) 0
Answer: (A)
Explanation: var is only declared and not defined (no memory allocated for it)
Refer: Understanding “extern” keyword in C
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