Reading a special char type using locale does not work. How to correct?

I'll give you a simple example to explain my doubt:

#include <stdio.h>
#include <conio.h>
#include <locale.h>

main(){

    setlocale(LC_ALL,"Portuguese");
    char a;

    printf("Insira um caractere especial,\nExemplos: ç, á, é, ê, ã, à...\n>>");
    scanf("%c", &a);

    printf("Você digitou '%c'", a);

    getch();

    return 0;
}                         

It does not consider the locale when reading the character of the user, I would learn to fix it! I have already been told that it is necessary to change the character encoding from DEV C ++ to UTF-8, does this information proceed? Because I did not figure out how to do this ...