// chess.c - wdg
// program to show a little 2D array stuff
#include <stdio.h>

void initBoard( char B[8][8] );
void placeRook( char B[8][8], int row, int col );
void printBoard( char B[8][8] );

const char CLEAR = '.';
const char ROOK = 'R';
const char ATTACKED = 'x';

int main(void) {
   char board[8][8];
   initBoard(board);
   placeRook(board,3,4);
   placeRook(board,5,0);
   printBoard(board);
   return 0;
}

// @pre: none
// @post: all entries in B are set to a period
void initBoard( char B[8][8] ) {
   int i,j;
   for(i=0; i<8; i++)
     for(j=0; j<8; j++) 
        B[i][j] = CLEAR;
}

// @pre: none
// @parms: assumes 0<= row, col < 8
// @post: rook added to board B at square indicated
void placeRook( char B[8][8], int row, int col ) {
   int i;
   for(i=0; i<8; i++) 
      B[row][i] = B[i][col] = ATTACKED;
   B[row][col] = ROOK;    
}

// @pre: none
// @post: contents of B printed on standard output
void printBoard( char B[8][8] ) {
   int i,j;
   for(i=0; i<8; i++) {
      for(j=0; j<8; j++) 
         printf("%c", B[i][j]);
    printf("\n");
  }
}