#include <stdio.h>

void Print_Board(int board[4][4], int already_correct[4][4], int g1, int g2);
void Print_Board2(int board[4][4], int already_correct[4][4], int g1, int g2, int g3, int g4);
int Finished(int finished[4][4]);

int main() {
   int board[4][4] = { {1, 2, 6, 4}, {3, 7, 8, 2}, {3, 6, 1, 8}, {4, 5, 5, 7} };
   int unguessed[4][4] = {{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}};
   int done = 0;
   int num_guesses = 0;
   int guess1, guess2;
   int guess3, guess4;

   while(!done) {
	printf("What is the first position? ");
	scanf("%d %d", &guess1, &guess2);

	Print_Board(board,unguessed,guess1,guess2);

	printf("What is the second position? ");
	scanf("%d %d", &guess3, &guess4);

	Print_Board2(board,unguessed,guess1,guess2,guess3,guess4);

	if(board[guess1][guess2] == board[guess3][guess4]) {
	    unguessed[guess1][guess2] = 1;
	    unguessed[guess3][guess4] = 1;
	}
	num_guesses++;

	printf("\n\n");

	done = Finished(unguessed);
   }

   printf("Good job!  It took %d guesses.\n", num_guesses);

   return 0;
}

int Finished(int already_correct[4][4]) {
    int finished = 1;
    int i,j;

    for(i=0; i<4; i++) {
	for(j=0; j<4; j++) {
	    if(!already_correct[i][j]) 
		finished = 0;
	}
    }
    return finished;
}

void Print_Board(int board[4][4],int already_correct[4][4],int g1, int g2) {
   int i,j;

   for(i=0; i<4; i++) {
	for(j=0; j<4; j++) {
	    if(already_correct[i][j] || i==g1 && j==g2) {
		printf("%2d", board[i][j]);
	    } else {
		printf(" *");
	    }
	}
	printf("\n");
   }
}
void Print_Board2(int board[4][4],int already_correct[4][4],int g1, int g2, int g3, int g4) {
   int i,j;

   for(i=0; i<4; i++) {
	for(j=0; j<4; j++) {
	    if(already_correct[i][j] || (i==g1 && j==g2) || (i==g3 && j==g4)) {
		printf("%2d", board[i][j]);
	    } else {
		printf(" *");
	    }
	}
	printf("\n");
   }
}