我是编程新手,所以我可以使用你的帮助与我的代码。我想读取一个数据格式像这样一个现有的文件:我张贴了我所有的代码C++:读取分隔文件并存储在结构中
2012-09-22|microsoft|0|102.36|100
2012-09-22|apple|0|203.12|100
2012-10-05|ibm|0|141.96|100
2012-10-05|boeing|0|123.65|100
2012-11-03|sears|0|23.36|100
2012-11-29|toyota|0|78.45|100
,但相关功能是无效loadData(交易allTransaction);功能。我从这里找到的多个示例中共同破解了这些代码,但它并不适合我。我正在尝试读取数据,然后填充allTransaction结构的变量。然后我想将该结构推送到数据向量。我想循环每一行,直到到达文件末尾。它看起来像我没有得到填充结构的值。请帮忙!
我一直在做这个编程2个月现在为学校,所以请保持您的响应noob级别。
感谢
#define _CRT_SECURE_NO_DEPRECATE // Declaration to use deprecated code in Visual Studio.
#include <iostream> // Include the iostream standard file.
#include <string> // Include the string library.
#include <fstream> // Include to manipulate files.
#include <vector> // Include to use vectors.
#include <sstream> // Include to use stringstream.
#include <ctime> // Include to calculate time.
using namespace std;
// Create transactions structure
struct transaction
{
/*int user = 0;*/
string date = "";
string stock = "";
bool sale = 0;
double price = 0.0;
int shares = 0;
};
// Create vector
vector <transaction> data;
// Function declarations
void loadData(transaction allTransaction);
void buyShares(transaction allTransaction);
void sellShares(transaction allTransaction);
void storeData(transaction allTransaction);
int main()
{
// Declare variables
transaction allTransaction; // Declaring a structure.
loadData(allTransaction);
cout << "Date: " << allTransaction.date <<
"Name: " << allTransaction.stock <<
"Sale?: " << allTransaction.sale <<
"Price: " << allTransaction.price <<
"Shares: " << allTransaction.shares;
//Pause program
cout << "Press Enter To Continue..." << endl;
cin.ignore();
cin.get();
return 0;
}
// Load text file function
void loadData(transaction allTransaction)
{
string line;
ifstream myfile("data.txt");
if (myfile.is_open())
{
while (getline(myfile, line))
{
istringstream f(line);
string s;
while (getline(f, s, '|')) {
myfile >> allTransaction.date >>
allTransaction.stock >>
allTransaction.sale >>
allTransaction.price >>
allTransaction.shares;
data.push_back(allTransaction);
}
myfile.close();
}
}
else std::cout << "Unable to open file";
}
// Buy stock function
void buyShares(transaction allTransaction)
{
allTransaction.sale = 0; // Set sale boolean to 0, indicating a buy.
storeData(allTransaction); // Call storeData function to store the data.
}
// Sell stock function
void sellShares(transaction allTransaction)
{
allTransaction.sale = 1; // Set sale boolean to 1, indicating a sell.
// Need function to check shares on hand.
storeData(allTransaction); // Call storeData function to store the data.
}
void storeData(transaction allTransaction)
{
ofstream myfile;
myfile.open("data.txt", ios::out | ios::app);
myfile << allTransaction.date << "|" << allTransaction.stock << "|" << allTransaction.sale << "|" <<
allTransaction.price << "|" << allTransaction.shares << '\n';
myfile.close();
data.push_back(allTransaction);
}
请考虑在你的问题是什么更具体一些。你有什么尝试,什么不工作。在我的头顶上,当你的交易通过引用传递时,你的许多例程都会按照价值交易你的交易。否则,您正在修改事务的_copy_,而不是原始事务本身。 – fbrereto 2014-11-21 07:22:35