1499IP地址

#include//暴力模拟
int change(int i,char a[]) { //将十进制转化为16进制
	if (i >= 16) {
		switch (i % 16) {
			case 0:
				a[0] = '0';
				break;
			case 1:
				a[1] = '1';
				break;
			case 2:
				a[1] = '2';
				break;
			case 3:
				a[1] = '3';
				break;
			case 4:
				a[1] = '4';
				break;
			case 5:
				a[1] = '5';
				break;
			case 6:
				a[1] = '6';
				break;
			case 7:
				a[1] = '7';
				break;
			case 8:
				a[1] = '8';
				break;
			case 9:
				a[1] = '9';
				break;
			case 10:
				a[1] = 'a';
				break;
			case 11:
				a[1] = 'b';
				break;
			case 12:
				a[1] = 'c';
				break;
			case 13:
				a[1] = 'd';
				break;
			case 14:
				a[1] = 'e';
				break;
			case 15:
				a[1] = 'f';
				break;
		}
		switch (i / 16) {
			case 0:
				a[0] = '0';
				break;
			case 1:
				a[0] = '1';
				break;
			case 2:
				a[0] = '2';
				break;
			case 3:
				a[0] = '3';
				break;
			case 4:
				a[0] = '4';
				break;
			case 5:
				a[0] = '5';
				break;
			case 6:
				a[0] = '6';
				break;
			case 7:
				a[0] = '7';
				break;
			case 8:
				a[0] = '8';
				break;
			case 9:
				a[0] = '9';
				break;
			case 10:
				a[0] = 'a';
				break;
			case 11:
				a[0] = 'b';
				break;
			case 12:
				a[0] = 'c';
				break;
			case 13:
				a[0] = 'd';
				break;
			case 14:
				a[0] = 'e';
				break;
			case 15:
				a[0] = 'f';
				break;
		}
	} else {
		switch (i % 16) {
				case 0:
							a[0] = '0';
							break;
						case 1:
							a[1] = '1';
							break;
						case 2:
							a[1] = '2';
							break;
						case 3:
							a[1] = '3';
							break;
						case 4:
							a[1] = '4';
							break;
						case 5:
							a[1] = '5';
							break;
						case 6:
							a[1] = '6';
							break;
						case 7:
							a[1] = '7';
							break;
						case 8:
							a[1] = '8';
							break;
						case 9:
							a[1] = '9';
							break;
						case 10:
							a[1] = 'a';
							break;
						case 11:
							a[1] = 'b';
							break;
						case 12:
							a[1] = 'c';
							break;
						case 13:
							a[1] = 'd';
							break;
						case 14:
							a[1] = 'e';
							break;
						case 15:
							a[1] = 'f';
							break;
		}

	}
	return 1;
}
int main() {
	int a1, a2, a3, a4;
	char a[3]="00", b[3]="00", c[3]="00", d[3]="00";
	scanf("%d.%d.%d.%d", &a1, &a2, &a3, &a4);
	change(a1, a);
	change(a2, b);
	change(a3, c);
	change(a4, d);
	printf("%s%s%s%sn", a, b, c, d);
	return 0;
}