pvjc24/cv1/program.c

#include <stdio.h>

char simulate_caps_lock(char c) {
    if ('a' <= c && c <= 'z') {
        return c - ('a' - 'A');
    } else if ('A' <= c && c <= 'Z') {
        return c + ('a' - 'A');
    } else {
        return c;
    }
}