719.cpp

C++实训教程

//719.CPP demo iostream user defined  输入操纵算子函数
#include <iostream.h>
#include <iomanip.h>

istream& OctInput(istream& is);
main(void)
{
  int n;
  cin >> OctInput >> n;
  cout << "输出为十进制＝" << n << endl;
  cout << "输出为十六进制＝" <<hex<< n << endl;
  return 0;
}
istream& OctInput(istream& is)
{
  cout <<"输入八进制数: ";
  cin >> oct;
  return is;
}
/*
输入八进制数: 777
输出为十进制＝511
输出为十六进制＝1ff
*/