#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main()
{
	int note1,note2;
	double f,p;

while (1) {
	printf("Please enter first MIDI note (0-127): ");
	scanf("%d", &note1);
	if (note1 >= 0 && note1 <= 127)
		break;

				else
                        printf("The value entered was invalid. Try again.\n");
}

while (1) {
	printf("Please enter second MIDI note (0-127): ");
	scanf("%d", &note2);
	if (note2 >= 0 && note2 <= 127)
        break;
                else
                        printf("The value entered was invalid. Try again.\n");
}

	return 0;
}