BASIC-10 十进制转十六进制

• 模拟或者使用setiosflags(ios::uppercase)+hex均可

#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef pair<int,int> P;
const int N=77;
const double PI=acos(-1);
#define line '\n'
#define gt getchar()
#define mid ((L+R)>>1)
int read(){int x=0,op=1;char c=gt;while(!isdigit(c)){if(c=='-')op=-1;c=gt;}while(isdigit(c))x=x*10+c-48,c=gt;return x*op;}
string get(int x)
{
	string str="";
	while(x){
		int t=x%16;
		if(t<=9)str=char(t+'0')+str;
		else str=char(t-10+'A')+str;
		x/=16;
	}
	if(str=="")str="0";
	return str;
}
int main()
{
	int n=read();
	cout<<get(n)<<line;
	//cout<<setiosflags(ios::uppercase)<<hex<<n<<endl;
	return 0;
}