Can't write getchar, gets like below?if so, why?

Question

char a;
getchar(a);

And,

Char a[100] = gets(a);

Answer 1

Hi!

The function prototype of getchar() is: int getchar ( void );
That's why getchar(a); is incorrect... it should be: a = getchar();

And when you try to do:

char a[100] = gets(a);

Throws an error because char a[100] can be initialized at compile time but not at runtime; gets(a) returns a string from user... (at runtime)