Function_toupper_and_islower

//#include <stdio.h>
//#include <stdlib.h>
#include <iostream>
//#include <string.h>
using namespace std;

int main() {

    // Se ok minusculo exibe or se ok Maiusculo Exibe !
    char a  = 'a';
    char b  = 'A';

    if(islower(a)){

        cout<<"E Minusculo"<<endl;

    }

   if(toupper(b)){

       cout<<"E Maiusculo"<<endl;

   }

    return 0;
}