[Kdar]

What would be logic of a program that would count capital letters inside a text file (document)?

Maybe using C or C++... or anything related.

[kmote]

Open a file stream, iterate through using isupper isupper - C++ Reference

PS I had to laugh. I didn't take me long to forget almost everything I knew about c.

EDIT: bit more info

file = fopen
do
int = getc
if isupper int
counter++
while condition

I will leave you to fill in the blanks.