porque o <conio.h> nao funciona com o gcc?

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

int main(void)
{
   clrscr();
   char letter;
   float percent;
for(letter = 'A'; letter <= 'Z'; letter++)
       putchar(letter);
   for(letter = 'z'; letter >='a'; letter--)
       putchar(letter);
   putchar(']n');
   for (percent = 0.0; percent < 1.0; percent +=0.1)
       printf("%3.1f\n", percent);
}

eu tenho a ultima versao do GCC instalado

Responder a