.
#include "pch.h"
#include <iostream>
const int i=21, j=21;
int main()
{
int a[i][j];
int x = fmin(i, j)/2;
for (int k1 = 0; k1 < i; k1++) {
for (int k2 = 0; k2 < j; k2++) {
if (abs(k1 - x) + abs(k2 - x) == x) {
a[k1][k2] = 0;
std::cout << "0";
}
else {
a[k1][k2] = 1;
std::cout << "1";
std::cout << "\n";
.
#include "pch.h"
#include <iostream>
const int i=21, j=21;
int main()
{
int a[i][j];
int x = fmin(i, j)/2;
for (int k1 = 0; k1 < i; k1++) {
for (int k2 = 0; k2 < j; k2++) {
if (abs(k1 - x) + abs(k2 - x) == x) {
a[k1][k2] = 0;
std::cout << "0";
}
else {
a[k1][k2] = 1;
std::cout << "1";
}
}
std::cout << "\n";
}
}