#include <stdio.h>
int main() { int side; printf(“請輸入正方形的邊長：”); scanf(“%d”, &side);
for (int i = 1; i <= side; i++) {
for (int j = 1; j <= side; j++) {
if (i == 1 || i == side || j == 1 || j == side) {
printf("*");
} else {
printf(" ");
}
}
printf("\n");
}
return 0;
}
