详见:https://leetcode.com/problems/convert-a-number-to-hexadecimal/description/ C++: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 classSolution { public: string toHex(intnum) { string hexString =""; string hexChar ="0123456789abcdef"; while(num) { hexString = hexChar[num & 0xF] + ...
Given an integernum, returna string representing its hexadecimal representation. For negative integers,two’s complementmethod is used. All the letters in the answer string should be lowercase characters, and there should not be any leading zeros in the answer except for the zero itself. Note: Y...
核心思路是每次取出最右边的四位进行与运算。 public StringtoHex2(int num){if(num==0){return"0";}char[]ch={'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};String result="";while(num!=0){result=ch[num&15]+result;num>>>=4;}returnresult;...
classSolution{public:stringtoHex(intnum){if(num==0x80000000)return"80000000";if(num==0)return"0";intflg=0;if(num<0)flg=-1;num=abs(num);string h_num;while(num){intm=num%16;if(m<10)h_num=char(m+'0')+h_num;elseh_num=char(m-10+'a')+h_num;num/=16;}if(flg==-1){inti...
链接:https://leetcode-cn.com/problems/convert-a-number-to-hexadecimal 著作权归领扣网络所有。商业转载请联系官方授权,非商业转载请注明出处。 思路 将负数转换为补码:我们知道对于一个负数 -a(a>0),其补码为 a 的二进制表示按位取反,然后加一;为什要这么做?因为要使得负数的二进制表示与这个负数绝对值的...
https://leetcode.com/problems/convert-a-number-to-hexadecimal/ // https://discuss.leetcode.com/topic/60365/simple-java-solution-with-comment/4 public class Solution { public String toHex(int num) { char []cmap = {'0','1','2','3','4','5','6','7','8','9','a','b','c...
The hexadecimal string must not contain extra leading 0s. If the number is zero, it is represented by a single zero character '0'; otherwise, the first character in the hexadecimal string will not be the zero character. The given number is guaranteed to fit within the range of a 32-bit...
/** @lc app=leetcode id=405 lang=cpp** [405] Convert a Number to Hexadecimal*/// @lc code=startclassSolution{public:stringtoHex(intnum){if(num==0)return"0";constautoHEX="0123456789abcdef";stringres;intcnt=0;while(num!=0&&cnt++<8){res+=HEX[num&0xf];num>>=4;}reverse(res.begi...
The hexadecimal string must not contain extra leading 0s. If the number is zero, it is represented by a single zero character '0'; otherwise, the first character in the hexadecimal string will not be the zero character. The given number is guaranteed to fit within the range of a 32-bit...
The hexadecimal string must not contain extra leading0s. If the number is zero, it is represented by a single zero character'0'; otherwise, the first character in the hexadecimal string will not be the zero character. The given number is guaranteed to fit within the range of a 32-bit si...