File content as of revision 2:7c413a5377b8:

// Code by Luis Sousa 

//#include <stdio.h>
//#include <stdlib.h>
//#include <time.h>
//#include <conio.h>
#include "mbed.h"

Serial pc(USBTX, USBRX);
DigitalOut redLED(LED_RED);               // Define digital outputs for each LED color
DigitalOut greenLED(LED_GREEN);
DigitalOut blueLED(LED_BLUE);

int main(void)
{
    pc.baud(9600);
    int ntent = 3;    //max tries
    int nint = 0;     //guess 
    int nsec = 0;     //secret number
    int acertou = 0;
    int valid = 0;    //valid number? 
    int play = 1;
    char opcao='N';   //option
    int n=0;

    do {
        redLED = 1;                           // This a common anode RGB LED, with the anodes connected
        greenLED = 1;                         // to 1. Thus, to turn a color off you counterintuitively set
        blueLED = 1;                          // it to 1, so there is no voltage difference across the LED
        /* NEW GAME */
        do {
//         clrscr();
            pc.printf("Enter secret number ? (0-9) \r\n");
            nsec=pc.getc() - '0';
            //scanf("%d", &nsec);
            if((nsec>=0)&(nsec<=9)) valid=1;
            else {
                valid=0;
                pc.printf("Invalid number. Must be in the 0 .. 9 range \r\n ");
                }
        } while(! valid);
        ntent=3;
        acertou=0;
//      clrscr(); /* player 2 can't see previous screen */
        for (n=0; n<40; n++) {
            pc.printf(" \r\n");
        }

        do {
            do {
                pc.printf("Guess the number. You have %d tries \r\n",ntent);
                nint=pc.getc() -'0';
                //scanf("%d", &nint);
                valid =(nint>=0)&(nint<=9);
            } while (! valid);
            ntent--;
            if (nint < nsec) {
                pc.printf("Too low.  ");
                redLED = 1;
                greenLED = 1;
                blueLED = 0;
            } else if (nint > nsec) {
                pc.printf("Too high.  ");
                redLED = 0;
                greenLED = 1;
                blueLED = 1;
            } else { /* if (nint == nsec) */
                pc.printf("You guessed!! %d tries missing! \r\n\n", ntent);
                acertou = 1;
                redLED = 1;
                greenLED = 0;
                blueLED = 1;
            }
            if (ntent ==0 & !acertou) {
                pc.printf("No more tries!!! You lost! \r\n\n");
                redLED = 0;
                greenLED = 1;
                blueLED = 1;
            } else if (!acertou) pc.printf("Try Again \r\n\n");
        } while ((!acertou)&(ntent>0));
        pc.printf("New game? (Y/N) \r\n");
        opcao=pc.getc();
//      scanf(" %c", &opcao);
//      opcao = getchar();    */
        if((opcao =='Y')||(opcao =='y')) play=1;
        else {
            play=0;
//          clrscr();
            pc.printf("Game Over! \r\n");
        }
    } while (play);
    redLED = 1;
    greenLED = 1;
    blueLED = 1;
    return 0;
}