Handling End Conditions

C:
c = getchar();
if(c == EOF)
...
...
c = getchar();
if(c == EOF)
...
...
c = getchar();
if(c == EOF)
...
...

C++:

int my_get_char() {
int c = getchar();
if(c == EOF)
throw EOF;
return c;
}
...

try {
...
c = my_get_char();
...
c = my_get_char();
...
} catch(int eof) {
...
}

Asm:
my_get_char:
cmp eax, EOF
jz is_eof
ret
is_eof:
pop eax
jmp eof_handler
...
call my_get_char
eof_at_1:
...
call my_get_char
eof_at_2:
...
call my_get_char
eof_at_3:
...
eof_handler:
cmp eax, eof_at_1
jz do_eof_at_1
...

No need to check EOF everywhere. Less bloat than exceptions. Asm is superior.

yeah, software is unreliable because people don't microoptimize every single fucking thing to the level of a single CPU cycle. meanwhile, your solution has one flaw that is pretty serious from the perspective of a software project that is supposed to be used by more than one person or maybe on a one specific system: it's restricted to x86.