boyring.cpp

《C++程序设计教程（第二版）》源代码 源代码中包括运行所需的数据文件,它的格式是*.txt,还有*.in和*.out的。头文件格式是*.h

//=====================================
// boyring.cpp
//=====================================
#include"boyring.h"
#include<iostream>
using namespace std;
//-------------------------------------
BoyRing::BoyRing(int n){
  if(n<2) throw exception();
  pBegin = new Boy[n];
  for(int i=1; i<=n; i++){
    pBegin[i-1].next = &pBegin[i%n];
    pBegin[i-1].code = i;
  }
  pivot = pCurrent = &pBegin[n-1];
}//------------------------------------
void BoyRing::countBy(int m){
  for(int i=1; i<=m; ++i){
    pivot = pCurrent;
    pCurrent = pCurrent->next;
  }
}//------------------------------------
int BoyRing::getNum() const {
  return pCurrent->code;
}//------------------------------------
void BoyRing::disengage(){
  pivot->next = pCurrent->next;
  pCurrent = pivot;
}//------------------------------------
void BoyRing::printAll()const{
  int numinLine = 0;
  Boy* p = pCurrent;
  do{
    cout<<"  "<<p->code;
    if(!(++numinLine%10)) cout<<"\n";
    p = p->next;
  }while(p!=pCurrent);
  cout<<"\n";
}//------------------------------------
BoyRing::~BoyRing(){
  delete[] pBegin;
}//------------------------------------