题解 | #进制转换#
进制转换
https://www.nowcoder.com/practice/0337e32b1e5543a19fa380e36d9343d7
#include <bits/stdc++.h> using namespace std; //这是答案的除法 string Divide(string str,int x) { //字符串除法int remainder = 0; //保存余数 int remainder = 0; for (int i = 0; i < str.size(); ++i) { int current = remainder * 10 + str[i] - '0'; str[i] = current / x + '0'; remainder = current % x; } int pos = 0; while (str[pos] == '0') { pos++; //寻找首个非0 下标 } return str.substr(pos); //删除前置多余的0} } // 这是我调试了很久的除法 呜呜呜!!! string divide(string str) { if (str.size() == 1) { string res = ""; res += (str[0] - '0') / 2 + '0'; return res; } string res = ""; int yushu = 0; for (int i = 0; i < str.size(); i++) { //从数的高位到低位遍历 int num = str[i] - '0' + yushu * 10; //先将每一位的字符转换为整数 if (num % 2 == 0) { //如果能整除 则该位为除法之后的数 res += '0' + num / 2; //添加进res中 yushu = 0; //此时余数为0 } else { //若不能被整除 yushu = 1; int temp = num / 2; //获得该位的值 if(i != 0 || temp != 0){ //如果第一位高位为0 不需要添加 其他情况都要添加字符 res += temp + '0'; } } } return res; } int main() { string num; while (cin >> num) { // 注意 while 处理多个 case if (num == "0") { cout << 0 << endl; continue; } stack<int> s; while ( num != "" && num != "0") { int t = (num[num.size() - 1] - '0') % 2; //对低位求余 s.push(t); //压入栈中 num = divide(num); //num 除以 2 } while (!s.empty()) { cout << s.top(); s.pop(); } cout << endl; } } // 64 位输出请用 printf("%lld")#考研复试#