Where does `getchar()` store the user input?

Question

I\'ve started reading \"The C Programming Language\" (K&R) and I have a doubt about the getchar() function.

For example this code:

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Answer 1

You're only using the variable c to contain each character one at a time.

Once you've displayed the first char (t) using putchar(c), you forget about the value of c by assigning the next character (o) to the variable c, replacing the previous value (t).