我在代码的最后一部分遇到了我的 ofstream 变量的问题。如何避免丢失 ofstream 中的信息?该问题是由程序的最后一部分产生的。
这是我得到的:
Action Movies
Comedy Movies
Drama Movies
Horror Movies
There are no movies for this genre
Mystery Movies
There are no movies for this genre
Romantic Movies
Adventure Movies
Western Movies
ife 1946 D 130 30 8.6 1946 103101
The Best Years of Our Lives 1946 R 172 181 8.1 1946 17648
Lawrence of Arabia 1962 V 216 48 8.5 1962 80746
For a Few Dollars More 1965 W 132 123 8.2 1965 45515
这是我应该得到的:
Action Movies
Braveheart 1995 A 177 88 8.3 1995 245089
Batman begins 2005 A 140 110 8.3 2005 275523
Comedy Movies
Amelie 2001 C 122 45 8.5 2001 185124
Singin' in the Rain 1952 C 103 77 8.3 1952 56368
Drama Movies
it's a Wonderful Life 1946 D 130 30 8.6 1946 103101
Horror Movies
There are no movies for this genre
Mystery Movies
There are no movies for this genre
Romantic Movies
The Best Years of Our Lives 1946 R 172 181 8.1 1946 17648
Adventure Movies
Lawrence of Arabia 1962 V 216 48 8.5 1962 80746
Western Movies
For a Few Dollars More 1965 W 132 123 8.2 1965 45515
这是我的打印功能:错误必须在这里,但我不知道如何解决它
void movieType::printMovieInfo(char* outFileName)
{
std::ofstream outFile;
if(!outFile.is_open())
outFile.open(outFileName, std::ios::app);
outFile<<name<<" "<<year<<" "<<genre<<" "<<length<<" "<<rank;
outFile<<" "<<weight<<" "<<year<<" "<<votes<<std::endl;
}
编辑为:
void movieType::printMovieInfo(std::ofstream& outFile)
{
outFile<<name<<" "<<year<<" "<<genre<<" "<<length<<" "<<rank;
outFile<<" "<<weight<<" "<<year<<" "<<votes<<std::endl;
}
在 main 的最后一部分:
ij.printMovieInfo("printList.txt");
变成
ij.printMovieInfo(outFile);
这是我的主要功能:问题是在程序结束时生成的
#include "movieType.h"
#include <iostream>
#include <fstream>
#include <string>
#include "PQType.h"
#include "QueType.h"//FIFO queue
using namespace std;
int main()
{
movieType movie[9];
ifstream inFile("movie1.txt");
ofstream outFile("printList.txt");
int i =0;
bool notDone=true;
while (notDone)
{
if (movie[i++].readMovieInfo(inFile)== false)
notDone=false;
}
PQType<movieType> PQqueue(8);
int j=0;
while(!PQqueue.IsFull())
{
PQqueue.Enqueue(movie[j++]);
}
QueType<movieType> fifoQueue[8];
string Genre[8]={"Action", "Comedy", "Drama", "Horror", "Mystery", "Romantic", "Adventure","Western"};
movieType it;
while (!PQqueue.IsEmpty())
{
PQqueue.Dequeue(it);
if (it.getGenre() == 'A')
fifoQueue[0].Enqueue(it);
else if (it.getGenre() == 'C' )
fifoQueue[1].Enqueue(it);
else if (it.getGenre() == 'D')
fifoQueue[2].Enqueue(it);
else if (it.getGenre() == 'H')
fifoQueue[3].Enqueue(it);
else if (it.getGenre() == 'M')
fifoQueue[4].Enqueue(it);
else if (it.getGenre() == 'R')
fifoQueue[5].Enqueue(it);
else if (it.getGenre() == 'V')
fifoQueue[6].Enqueue(it);
else if (it.getGenre() == 'W')
fifoQueue[7].Enqueue(it);
}
//Problem is generated here.
movieType ij;
for (int i=0;i<8;++i)
{
outFile<<Genre[i]<<" Movies"<<endl;
if (fifoQueue[i].IsEmpty())
outFile<<"There are no movies for this genre"<<endl;
for(int j=0; fifoQueue[i].IsEmpty() != true; ++j)
{
fifoQueue[i].Dequeue(ij);
ij.printMovieInfo("printList.txt");
}
outFile<<endl;
}
return 0;
}