进制转换

 1 #include<iostream>
 2 #include<iomanip>
 3 //#include<bits/stdc++.h>
 4 #include<cstdio>
 5 #include<cmath>
 6 #include<cstring>
 7 #include<sstream>
 8 #define PI  3.14159265358979
 9 #define LL long long
10 #define  eps   0.00000001
11 #define LL long long
12 using namespace std;
13 int main()
14 {
15    LL n,m;int ans[1001];
16    while(cin>>n>>m)
17  {
18      bool r=true;int Y=n;
19      if(n<0) {r=0;n=-n;}
20      if(n==0) {cout<<0<<endl;continue;}
21         int  k=1;
22      while(n)
23      {
24          ans[k++]=n%m;
25          n/=m;
26 
27      }
28      if(r==0) cout<<‘-‘;
29      for(int i=k-1;i>=1;--i)
30      {
31          if(m>=10&&ans[i]>=10) cout<<char(55+ans[i]);
32          else cout<<ans[i];
33      }
34      cout<<endl;
35  }
36 }