将整行字符串写入文件时遇到问题

Question

好吧，伙计们！写入文件时遇到问题。基本上，我的问题是，当我写入文件时，例如变量person.address1 中的2913 Harvey Drive 之类的地址将被写入文件中的单独行而不是一行。我需要它们在一条线上。我做了一些研究，但找不到任何我能理解的东西，所以我希望我能有一个与我的代码相关的例子来帮助我理解。这是我的代码：

int newEntry()
{
string str;
Client person;
char response;
double temp1;
double temp2;
ostringstream strs1;
ostringstream strs2;

//create file object and open file
fstream customer("customer.dat", ios:: out | ios::app);

if (!customer)
{
    cout << "Error opening file. Program aborting." << endl;
}

do
{
    cout << "Enter client information:" << endl << endl;
    cout << "Name:               ";
    cin  >> person.name;
    cout << endl;

    cout << "Address 1:          ";
    cin  >> person.address1;
    cout << endl;

    cout << "Address 2:          ";
    cin  >> person.address2;
    cout << endl;

    cout << "Phone:              ";
    cin  >> person.phone;
    cout << endl;

    cout << "Acct. Balance:      ";
    cin  >> temp1;
    strs1 << temp1;
    str = strs1.str();
    person.acctBal = str;
    cout << endl;

    cout << "Last Payment:       ";
    cin  >> temp2;
    strs2 << temp2;
    str = strs2.str();
    person.lastPay = str;
    cout << endl;

    customer << person.name << endl;
    customer << person.address1 << endl;
    customer << person.address2 << endl;
    customer << person.phone << endl;
    customer << person.acctBal << endl;
    customer << person.lastPay << endl;
    customer << endl;       //blank space in file

    cout << endl << "Do you want to enter another record? (Enter Y for Yes, N 
                             for No):   ";
    cin  >> response;
    //add validation to make sure they enter y or n
    cout << endl << endl;
    cout << BORDER << endl << endl;


} while (toupper(response) == 'Y');

customer.close();

return 1;
}

我看到了一些关于连接字符串变量然后将整个字符串变量保存到文件的内容，但我不确定我是否也能理解如何读回每一行。下面是读取代码的函数：

int displayAll()
{
vector<Client> store;
string space;
Client foo;
int i = 0;

fstream customer("customer.dat", ios::in);

if (!customer)
{
    cout << "Error opening file. Program aborting." << endl;
    return 0;
}

while (!customer.eof())
{
    store.push_back(foo);

    customer >> store[i].name;
    customer >> store[i].address1;
    customer >> store[i].address2;
    customer >> store[i].phone;
    customer >> store[i].acctBal;
    customer >> store[i].lastPay;
    customer >> space;

    i++;
}

for (int k = 0; k < i; k++)
{
    cout << "   Name:               " << store[k].name << endl
         << "   Address 1:          " << store[k].address1 << endl
         << "   Address 2:          " << store[k].address2 << endl
         << "   Phone:              " << store[k].phone << endl
         << "   Acct. Balance:      " << store[k].acctBal << endl
         << "   Last Payment:       " << store[k].lastPay << endl << endl;
}

cout << BORDER << endl << endl;

customer.close();
return 1;

}

因此，例如，如果我使用了连接方法，例如：

string += person.name; string += newLine; //newLine would be a variable holding the endl function string += person.address;

（我不确定我是否理解上面的代码以及它是如何工作的，或者我是否做得对。） 然后将 string 变量保存到文件中，customer >> store[i].name 会存储整行还是只存储空格？

Answer 1

使用空白输入字符串：

 #include <stdio.h>

int main()
{
 char string [256];
 printf ("Insert your full address: ");
 gets (string);     // warning: unsafe (see fgets instead)
 printf ("Your address is: %s\n",string);
 return 0;

}

像这样连接字符串：

#include <stdio.h>
#include <string.h>

 int main ()
{
char str[80];
strcpy (str,"these ");
strcat (str,"strings ");
strcat (str,"are ");
strcat (str,"concatenated.");
puts (str);
return 0;

}