C++各种进制的转换

 /*
 @author:CodingMengmeng
 @theme:各种进制之间的转换
 @time:2017-1-6 21:39:08
 @blog:http://www.cnblogs.com/codingmengmeng/
 */
 #include <iostream>
 using namespace std;

 //十进制数转换成二进制数
 void decimal2Binary(int n)
 {
     if (n < )
         cout << n;
     if (n >= )
     {
         decimal2Binary(n / );
         cout << n % ;
     }
 }

 //十进制数转换成八进制数
 void decimal2Octal(int n)
 {
     if (n < )
         cout << n;
     if (n >= )
     {
         decimal2Octal(n / );
         cout << n % ;
     }
 }

 //十进制转换成十六进制数
 void decimal2Hex2(int n)
 {
     switch (n)
     {
         case :    cout << "A"; break;
         case :    cout << "B"; break;
         case :    cout << "C"; break;
         case :    cout << "D"; break;
         case :    cout << "E"; break;
         case :    cout << "F"; break;
         default:cout << n;
     }
 }

 void decimal2Hex(int n)
 {
     if (n < )
         decimal2Hex2(n);
     if (n>)
     {
         decimal2Hex(n / );
         decimal2Hex2(n % );
     }
 }

 int main(void)
 {
     int n;
     cout << "input a value of n ：" << endl;
     cin >> n;
     cout << "the results that decimal converts to binary,octal and Hex are as follows:" << endl;
     decimal2Binary(n);
     cout << endl;
     decimal2Octal(n);
     cout << endl;
     decimal2Hex(n);
     cout << endl;

     getchar();
     return ;
 }

运行结果：