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Question


Point out the error in the program


#include<stdio.h>
int main()
{
int a=10;
void f();
a = f();
printf("%d\n", a);
return 0;
}
void f()
{
printf("Hi");
}
Options:
A .  Error: Not allowed assignment
B .  Error: Doesn't print anything
C .  No error
D .  None of above
Answer: Option A

The function void f() is not visible to the compiler while going through main() function. 

So we have to declare this prototype void f(); before to main() function. This kind of 

error will not occur in modern compilers.



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