#includeint main (void){int x,y,num;printf ("请输入正方形的边长：");scanf ("%d",num);for (x = 0; x < num; x++) {for (y = 0; y < num; y++) {if (x == 0 || y == 0 || x == num - 1 || y == num - 1) {//正方...
#includeint main (void){int x,y,num;printf ("请输入正方形的边长：");scanf ("%d",num);for (x = 0; x < num; x++) {for (y = 0; y < num; y++) {if (x == 0 || y == 0 || x == num - 1 || y == num - 1) {//正方...