// ChessKingQueen.c : Questo file contiene la funzione 'main', in cui inizia e termina l'esecuzione del programma.
//

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

int xK, yK, xQ, yQ;


int main() {
    printf("This program indicates, given the position of the king and queen on a chessboard,\nwhether the queen can eat the king.\n\n");
    printf("Enter the king column (1-8): ");
    if (scanf("%d", &xK) != 1)
    {
        perror("Error reading king column: \n");
        exit(1);
    }
    printf("Enter the king row (1-8): ");
    if (scanf("%d", &yK) != 1)
    {
        perror("Error reading king row: \n");
        exit(1);
    }
    printf("Enter the queen column (1-8): ");
    if (scanf("%d", &xQ) != 1)
    {
        perror("Error reading queen column: \n");
        exit(1);
    }
    printf("Enter the queen row (1-8): ");
    if (scanf("%d", &yQ) != 1)
    {
        perror("Error reading queen row: \n");
        exit(1);
    }
    if ( (xK == xQ) || (yK == yQ) || ((yK - yQ)/(xK - xQ) == 1) || ((yK - yQ)/(xK - xQ) == -1))
    {
        printf("The queen eats the king");
    }
    else
    {
        printf("The queen does not eat the king");
    }
    return 0;
}