Part of the "Chess in C" blog post series. The complete code for part 1.

chessInCPart1-complete.c

#include <stdio.h>
#include <stdlib.h>
#define EMPTY 0
#define KING 1
#define QUEEN 2
#define ROOK 3
#define KNIGHT 4
#define BISHOP 5
#define PAWN 6
#define BREADCRUMB 9

int main(void) {
    int board[8][8];
    int i, j;
    int boardValue;

    /* Zero out the board */
    for (i = 0; i <= 7; i++) {
       for (j = 0; j <= 7; j++) {
          /* Zero out the square */
          board[i][j] = 0;
       }
    }

    /* Iterate backward through board */
    for (i = 7; i >= 0; i--) {
       for (j = 7; j >= 0; j--) {
          /* Zero out the square */
          board[i][j] = 0;
       }
    }

    /* Set initial start positions */
    board[0][0] = ROOK;
    board[0][1] = KNIGHT;
    board[0][2] = BISHOP;
    board[0][3] = QUEEN;
    board[0][4] = KING;
    board[0][5] = BISHOP;
    board[0][6] = KNIGHT;
    board[0][7] = ROOK;
    board[1][0] = PAWN;
    board[1][1] = PAWN;
    board[1][2] = PAWN;
    board[1][3] = PAWN;
    board[1][4] = PAWN;
    board[1][5] = PAWN;
    board[1][6] = PAWN;
    board[1][7] = PAWN;

    /* Print the board */
    /* For every row */
    for (i = 0;i <= 7; i++) {
        /* And every column */
        for (j = 0;j <= 7; j++){
            /* Get the board value */
            boardValue = board[i][j];

            /* And print the contents */
            switch (boardValue) {
              case EMPTY:       printf(".");
                                break;
              case KING:        printf("K");
                                break;
              case QUEEN:       printf("Q");
                                break;
              case ROOK:        printf("R");
                                break;
              case KNIGHT:      printf("N");
                                break;
              case BISHOP:      printf("B");
                                break;
              case PAWN:        printf("P");
                                break;
              case BREADCRUMB:  printf("+");
                                break;
            }
          }
          /* At the end of each row, make a new line */
          printf("\n");
     }
    return EXIT_SUCCESS;
}