源程序：
#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
int n = 65535,m = 20;
cout<<"1)"<<n<<"n"<<"="<<hex<<n<<"="<<oct<<n<<endl;
cout<<"2)"<<setbase(10)<<m<<"="<<setbase(16)<<m
<<"="<<setbase(8)<<m<<endl;
cout<<"3)"<<showbase;
cout<<setbase(10)<<m<<"="<<setbase(16)<<m<<"="
<<setbase(8)<<m<<endl;
return 0;
}
运行结果：
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