题解 | #进制转换#
进制转换
http://www.nowcoder.com/practice/8f3df50d2b9043208c5eed283d1d4da6
import java.util.Scanner; /** * @author Shan * @create 2021-05-31 下午 8:02 */ public class test { public static void main(String args[]) { Scanner scanner = new Scanner(System.in); StringBuilder builder = new StringBuilder(); while (scanner.hasNext()) { char[] chars = scanner.nextLine().toCharArray(); int i = 0; if (chars.length > 2 && chars[i] == '0' && (chars[1] == 'x' || chars[1] == 'X')) { i = i + 2; //跳过‘0x’ || ‘0X’ } int result = 0; while (i < chars.length) { int temp = 0; if(chars[i]=='a' || chars[i]=='A') temp=10; else if(chars[i]=='b' || chars[i]=='B') temp=11; else if(chars[i]=='c' || chars[i]=='C') temp=12; else if(chars[i]=='d' || chars[i]=='D') temp=13; else if(chars[i]=='e' || chars[i]=='E') temp=14; else if(chars[i]=='f' || chars[i]=='F') temp=15; else temp=chars[i]-'0'; result = result * 16 + temp; i++; } System.out.println(result); } } }