void Tone1(){Sound_Play(659, 250);}    // Frequency = 659Hz, duration = 250ms
void Tone2(){Sound_Play(698, 250);}     // Frequency = 698Hz, duration = 250ms
void Tone3(){Sound_Play(784, 250);}    // Frequency = 784Hz, duration = 250ms
void Melody()             // Plays the melody "Yellow house"
{
Tone1(); Tone2(); Tone3(); Tone3();
Tone1(); Tone2(); Tone3(); Tone3();
Tone1(); Tone2(); Tone3();
Tone1(); Tone2(); Tone3(); Tone3();
Tone1(); Tone2(); Tone3();
Tone3(); Tone3(); Tone2(); Tone2(); Tone1();
}
void ToneA(){Sound_Play( 880, 50);}
void ToneC(){Sound_Play(1046, 50);}
void ToneE(){Sound_Play(1318, 50);}
void Melody2()
{
unsigned short i;
for (i = 9; i > 0; i--)
     {
    ToneA(); ToneC(); ToneE();
     }
}
void main() {
 TRISC  = 0xFF;                       // Configure PORTC as inputs
 TRISD=0;
   Sound_Init(&PORTD, 0);          // Buzzer connected to PORTD pin 0 = RD0
 
 Sound_Play(880, 1000);                // Play sound at 880Hz for 1 second
while (1) {
  if (Button(&PORTC,0,1,1))           // RC0 plays Tone1
    Tone1();
  while (RC0_bit) ;                    // Wait for button to be released
  if (Button(&PORTC,1,1,1))           // RC1 plays Tone2
    Tone2();
  while (RC1_bit) ;                    // Wait for button to be released
  if (Button(&PORTC,2,1,1))           // RC2 plays Tone3
    Tone3();
  while (RC2_bit) ;                    // Wait for button to be released
  if (Button(&PORTC,3,1,1))           // RC3 plays Melody2
    Melody2();
  while (RC3_bit) ;                    // Wait for button to be released
  if (Button(&PORTC,4,1,1))           // RC4 plays Melody
    Melody();
  while (RC4_bit) ;                    // Wait for button to be released
}
}