这是完整的错误信息
> In file included from
> c:\mingw\bin\../lib/gcc/mingw32/4.7.2/include/c++/vector:63:0,
> from PlayerDatabase.h:4,
> from PlayerDatabase.cpp:6:
c:\mingw\bin\../lib/gcc/mingw32/4.7.2/include/c++/bits/stl_construct.h:
> In function 'void std::_Construct(_T1*, const _T2&)':
> c:\mingw\bin\../lib/gcc/mingw32/4.7.2/include/c++/bits/stl_construct.h:85:13:
> error: expected type-specifier before 'static_cast'
> c:\mingw\bin\../lib/gcc/mingw32/4.7.2/include/c++/bits/stl_construct.h:85:13:
> error: expected ')' before 'static_cast'
> c:\mingw\bin\../lib/gcc/mingw32/4.7.2/include/c++/bits/stl_construct.h:85:13:
> error: expected ';' before 'static_cast'
PlayerDatabase.h:4 中包含的文件是矢量头文件
我在我的 cpp 文件中使用了动态转换，在通过 push_baxk() 将它们插入向量之前将投手和击球手指针更改为基类棒球运动员指针，这是问题吗？
这是 playerdatabase.h 文件
#include <vector>
#include "BaseballPlayer.h"
#include "Hitter.h"
#include "Pitcher.h"
// 这是玩家数据库类定义
class PlayerDatabase {
public:
PlayerDatabase();
PlayerDatabase(PlayerDatabase&);
PlayerDatabase& operator= (PlayerDatabase&);
~PlayerDatabase();
void print_team(std::ofstream&);
void load_team(std::ifstream&);
void create_good_team();
void create_small_team();
int get_team_count();
private:
std::vector<BaseballPlayer*> team;
};
这是 playerdatabase.cpp
#include <iomanip>
#include "cppMemDbg.h"
#include "PlayerDatabase.h"
const char HITTER='H';
const char PITCHER='P';
const int REDUCE_BY=4;
// 没有参数的默认构造函数
PlayerDatabase::PlayerDatabase(){
}
// 复制构造函数
PlayerDatabase::PlayerDatabase(PlayerDatabase& right){
std::vector<BaseballPlayer*>::iterator begin, end;
begin=right.team.begin();
end=right.team.end();
while (begin!=end){
Pitcher* pPlayer= dynamic_cast<Pitcher*>(*begin);
if (pPlayer){
Pitcher* pitcher= new Pitcher(*pPlayer);
team.push_back(dynamic_cast<BaseballPlayer*>(pitcher));
}
else{
Hitter* hPlayer= dynamic_cast<Hitter*>(*begin);
Hitter* hitter= new Hitter(*hPlayer);
team.push_back(dynamic_cast<BaseballPlayer*>(hitter));
}
begin++;
}
}
// 赋值运算符
PlayerDatabase& PlayerDatabase::operator= (PlayerDatabase& right){
if (team==right.team)
return *this;
else {
std::vector<BaseballPlayer*>::iterator begin, end;
begin=right.team.begin();
end=right.team.end();
while (begin!=end){
Pitcher* pPlayer= dynamic_cast<Pitcher*>(*begin);
if (pPlayer){
Pitcher* pitcher= new Pitcher(*pPlayer);
BaseballPlayer* bplayer= dynamic_cast<BaseballPlayer*>(pitcher);
team.push_back(bplayer);
}
else{
Hitter* hPlayer= dynamic_cast<Hitter*>(*begin);
Hitter* hitter= new Hitter(*hPlayer);
BaseballPlayer* bplayer= dynamic_cast<BaseballPlayer*>(hitter);
team.push_back(bplayer);
}
begin++;
}
}
return *this;
}
// 析构函数
PlayerDatabase::~PlayerDatabase(){
std::vector<BaseballPlayer*>::iterator iter;
for (iter=team.begin();iter!=team.end();iter++){
if (*iter)
delete *iter;
*iter=nullptr;
}
team.clear();
}
// 将棒球运动员打印到标准输出并将它们写入给定文件的函数
void PlayerDatabase::print_team(std::ofstream& outputFile){
int totalHits=0, totalAtBats=0, totalEarnedRuns=0;
float totalInningsPitched=0.0;
std::vector<BaseballPlayer*>::iterator begin, end;
begin=team.begin();
end=team.end();
int member=1;
while (begin!=end){
std::cout<<"Member "<<member<<std::endl;
(*begin)->print_player(outputFile);
Pitcher* pPlayer= dynamic_cast<Pitcher*>(*begin);
if (pPlayer){
totalEarnedRuns+=pPlayer->earnedRuns;
totalInningsPitched+=pPlayer->inningsPitched;
begin++;
member++;
}
else{
Hitter* hPlayer= dynamic_cast<Hitter*>(*begin);
totalHits+=hPlayer->hits;
totalAtBats+=hPlayer->atBats;
begin++;
member++;
}
}
if(totalAtBats==0||totalInningsPitched==0.0){
if(totalAtBats==0&&totalInningsPitched==0.0){
std::cout<<"Team Batting Average: "<<"n/a"<<std::endl;
std::cout<<"Team ERA: "<<"n/a"<<std::endl;
}
else if (totalAtBats==0){
std::cout<<"Team Batting Average: "<<"n/a"<<std::endl;
std::cout<<"Team ERA: "<<(totalEarnedRuns/totalInningsPitched*9)<<std::endl;
}
else {
std::cout<<"Team Batting Average: "<<std::fixed<<std::setprecision(3)<<totalHits/(double)totalAtBats<<std::endl;
std::cout<<"Team ERA: "<<"n/a"<<std::endl;
}
}
else{
std::cout<<"Team Batting Average: "<<std::fixed<<std::setprecision(3)<<totalHits/(double)totalAtBats<<std::endl;
std::cout<<"Team ERA: "<<(totalEarnedRuns/totalInningsPitched*9)<<std::endl;
}
}
// 从格式化的输入文件中加载棒球运动员
void PlayerDatabase::load_team(std::ifstream& input){
int counter=1;
while (!input.eof()){
char playerType;
input.get(playerType);
if (playerType==HITTER){
Hitter* hitter= new Hitter;
hitter->load_player(input);
std::cout<<"Loading member "<<counter<<std::endl;
team.push_back(dynamic_cast<BaseballPlayer*>(hitter));
counter++;
}
else if (playerType==PITCHER){
Pitcher* pitcher= new Pitcher;
pitcher->load_player(input);
std::cout<<"Loading member "<<counter<<std::endl;
team.push_back(dynamic_cast<BaseballPlayer*>(pitcher));
counter++;
}
}
}
// 通过消除一些基于 goodHitter() 和 goodPitcher() 函数的函数来创建一个好的团队
void PlayerDatabase::create_good_team(){
std::vector<BaseballPlayer*> goodTeam;
std::vector<BaseballPlayer*>::iterator begin, end;
begin=team.begin();
end=team.end();
while (begin!=end){
Pitcher* pPlayer= dynamic_cast<Pitcher*>(*begin);
if (pPlayer){
if(pPlayer->goodPitcher()){
goodTeam.push_back(dynamic_cast<BaseballPlayer*>(pPlayer));
}
else {
if (*begin)
delete *begin;
*begin=nullptr;
}
begin++;
}
else{
Hitter* hPlayer= dynamic_cast<Hitter*>(*begin);
if(hPlayer->goodHitter()){
goodTeam.push_back(dynamic_cast<BaseballPlayer*>(hPlayer));
}
else {
if (*begin)
delete *begin;
*begin=nullptr;
}
begin++;
}
}
team.clear();
team=goodTeam;
}
// 创建一个小团队，删除向量中的前四个玩家
void PlayerDatabase::create_small_team(){
if(get_team_count()>=REDUCE_BY){
std::vector<BaseballPlayer*>::iterator first, fifth;
first= team.begin();
fifth=first+REDUCE_BY;
while (first!=fifth){
if (*first)
delete *first;
*first=nullptr;
first++;
}
team.erase(team.begin(),fifth);
}
else {
std::vector<BaseballPlayer*>::iterator first,last;
first= team.begin();
last=team.end();
while(first!=last){
if (*first)
delete *first;
*first=nullptr;
first++;
}
team.clear();
}
} // 团队成员的数量
int PlayerDatabase::get_team_count(){
return team.size();
}
这部分有什么问题吗？
std::vector<BaseballPlayer*>::iterator begin, end;
begin=right.team.begin();
end=right.team.end();