对于我正在做的项目,我们必须使用“House”对象填充队列。 “House”对象从名为“data.dat”的文件中获取其信息。文件的每一行都是另一个进入house对象的东西。所以首先我为地址取一个char *,然后是一个int,另一个int,一个第三个int,然后是另一个char *。我们不会大声使用字符串来获取char *变量,我相信这是我遇到问题的地方。每次我编译它告诉我,我有一个分段错误。这是我的queue.cpp的区域,我很确定错误在
#include"queue.h"
#include<iostream>
#include<fstream>
#include<istream>
Queue::Queue(const char *filename){
head = NULL;
tail = NULL;
std::ifstream infile(filename);
char * address = NULL;
int footage = 0;
int bedrooms = 0;
int bathrooms = 0;
char * features = NULL;
while(!infile.eof()){
while(infile.get() != '\n'){
//std::cout << infile.get();
infile.get(address[i]);
}
infile >> footage >> bedrooms >> bathrooms;
while(infile.get() != '\n'){
infile.get(features[i]);
}
enqueue(House(address, footage, bedrooms, bathrooms, features));
}
infile.close();
}
这是house对象头文件:
House();
House(char * ad, int fo, int be, int ba, char * fe);
char * getAddress();
int getFootage();
int getBedrooms();
int getBathrooms();
char * getFeatures();
void setAddress(char * ad);
void setFootage(int fo);
void setBedrooms(int be);
void setBathrooms(int ba);
void setFeatures(char * fe);
friend std::ostream& operator<<(std::ostream& out, House& house);
private:
char * address;
int footage;
int bedrooms;
int bathrooms;
char * features;
};
答案 0 :(得分:0)
您需要先使用ItemID_10
初始化features
和address
,或者将其创建为某个长度的字符数组。
你这样做的方式是你试图写入尚未分配的内存 - 因此缓冲区溢出。
答案 1 :(得分:0)
为了好玩,这里有一个清理过的版本
char*
取代std::string
(因为我们正在做C ++)while (!infile.eof())
,检查提取运算符)我没有实现你的队列:)
<强> Live On Coliru 强>
#include <iostream>
#include <fstream>
#include <sstream>
struct House {
House()
: address(), footage(0), bedrooms(0), bathrooms(0), features()
{ }
House(std::string ad, int fo, int be, int ba, std::string fe)
: address(ad), footage(fo), bedrooms(be), bathrooms(ba), features(fe)
{ }
std::string getAddress() const { return address; }
int getFootage() const { return footage; }
int getBedrooms() const { return bedrooms; }
int getBathrooms() const { return bathrooms; }
std::string getFeatures() const { return features; }
void setAddress(std::string ad) { address = ad; }
void setFootage(int fo) { footage = fo; }
void setBedrooms(int be) { bedrooms = be; }
void setBathrooms(int ba) { bathrooms = ba; }
void setFeatures(std::string fe) { features = fe; }
friend std::ostream &operator<<(std::ostream &out, House const &house) {
return out << "Address: " << house.getAddress() << '\n'
<< "Footage: " << house.getFootage() << '\n'
<< "Bed rooms: " << house.getBedrooms() << '\n'
<< "Bath rooms: " << house.getBathrooms() << '\n'
<< "Features: " << house.getFeatures() << '\n';
}
private:
std::string address;
int footage;
int bedrooms;
int bathrooms;
std::string features;
};
struct Queue {
Queue(std::string filename);
struct Node {
House value;
Node* next;
};
Node *head, *tail;
void enqueue(House const& h) {
// TODO
std::cout << h << "\n";
}
};
Queue::Queue(std::string filename) : head(nullptr), tail(nullptr) {
std::ifstream infile(filename);
std::string address;
int footage = 0;
int bedrooms = 0;
int bathrooms = 0;
std::string features;
std::string line; // lines
while (getline(infile, address) && getline(infile, line)) {
std::istringstream iss(line);
if (iss >> footage >> bedrooms >> bathrooms && getline(iss, features)) {
enqueue(House(address, footage, bedrooms, bathrooms, features));
}
}
}
int main()
{
Queue q("data.dat");
}
输入:
Blv. Dreams Abroken 24, 78377d XG, ClassyCode
2 4 1 pool sauna porch indoor-parking
Oyi. Qernzf Noebxra 24, 78377q KT, PynfflPbqr
3 8 2 cbby fnhan cbepu vaqbbe-cnexvat
打印输出:
Address: Blv. Dreams Abroken 24, 78377d XG, ClassyCode
Footage: 2
Bed rooms: 4
Bath rooms: 1
Features: pool sauna porch indoor-parking
Address: Oyi. Qernzf Noebxra 24, 78377q KT, PynfflPbqr
Footage: 3
Bed rooms: 8
Bath rooms: 2
Features: cbby fnhan cbepu vaqbbe-cnexvat