Printing 2d array box - c

Question

I am new to programming. Figuring on how can I print out the box using for loop so it makes a big box? I had attached the sample below. I really need help.
#include <stdio.h>
int main()
{
int a;
printf("\n --- \n");
for(a=1;a<=1;++a)
printf("\n| |\n");
printf("\n --- ");
return 0;
}
Example output:

Answer 1

Something like this could work. You need basic understanding of nested loops to be able to do this question.
#include <stdio.h>
#include <stdlib.h>
int
main(int argc, char const *argv[]) {
int rows, cols, i, j;
printf("Enter rows for box: ");
if (scanf("%d", &rows) != 1) {
printf("Invalid rows\n");
exit(EXIT_FAILURE);
}
printf("Enter columns for box: ");
if (scanf("%d", &cols) != 1) {
printf("Invalid columns\n");
exit(EXIT_FAILURE);
}
printf("\n2D Array Box:\n");
for (i = 1; i <= rows; i++) {
for (j = 1; j <= cols; j++) {
printf(" --- ");
}
printf("\n");
for (j = 1; j <= cols; j++) {
printf("| |");
}
printf("\n");
}
/* bottom "---" row */
for (i = 1; i <= cols; i++) {
printf(" --- ");
}
return 0;
}

Answer 2

first character(' ') and repeat string ("--- ")
first line and repeat contents line and bar line.
#include <stdio.h>
#define MARK "X O"
//reduce code
#define DRAW_H_BAR()\
do {\
putchar(' ');\
for(int i = 0; i < cols; ++i)\
printf("%s ", h_bar);\
puts("");\
}while(0)
void printBoard(int rows, int cols, int board[rows][cols]){
const char *h_bar = "---";
const char v_bar = '|';
DRAW_H_BAR();//first line
for(int j = 0; j < rows; ++j){
//contents line
putchar(v_bar);
for(int i = 0; i < cols; ++i)
printf(" %c %c", MARK[board[j][i]+1],v_bar);
puts("");
DRAW_H_BAR();//bar line
}
}
int main(void){
int board[8][8] = {
{1,0,1,0,1,0,1,0},
{0,1,0,1,0,1,0,1},
{1,0,1,0,1,0,1,0},
{0,0,0,0,0,0,0,0},
{0,0,0,0,0,0,0,0},
{0,-1,0,-1,0,-1,0,-1},
{-1,0,-1,0,-1,0,-1,0},
{0,-1,0,-1,0,-1,0,-1}
};
int rows = sizeof(board)/sizeof(*board);
int cols = sizeof(*board)/sizeof(**board);
printBoard(rows, cols, board);
}