Thread: Storing Information then Displaying

i have a simple program that asks the user for thier name, last name, and age then asks them if they want to either save the file or add new information (loops back to the begining and asks the same things).

what i cant do is store the information of each time they want to add more information and display it all in the end and then be abel to save it all at the end and re-open it (i have the file saving and opening code complete so not a problem with that).

for example

Code:

enter name: bob
last name: thornton
age:21

would you like to add more (y/n) y

enter name: tim
last name : peckitt
age: 21

would you like to add more (y/n) y

enter name: sue 
last name:  brigde
age: 33

would you like to add more (y/n) n

(part i cant do) display all:

Code:

bob
thronton
21

tim
peckitt
21

sue
bridge
33

use a vector<> and push_back() what they input.

Alternatively, you could ask what the max number of users would be, and use new to allocate memory for that.

Code:

struct data_t {
    int age;
    string Firstname;
    string Lastname;
};

would work better.

if it helps this is the code i am using

Code:

#include <fstream>
#include <iostream>
using namespace std;

void saveinformation(char order);

void other()
{
    char FirstName[30], LastName[30];
    int Age;
    char FileName[20];
    cout << "Enter the name of the file you want to open: ";
    cin >> FileName;
    ifstream Students(FileName);
    Students >> FirstName >> LastName >> Age;

	cout << "\nFirst Name: " << FirstName;
    cout << "\nLast Name:  " << LastName;
    cout << "\nEnter Age:  " << Age;

    cout << "\n\n";
    system("pause");
}

int main()
{

    char FirstName[30], LastName[30];
    int Age;
    char FileName[20];
    
    cout << "Enter First Name: ";
    cin >> FirstName;
    cout << "Enter Last Name:  ";
    cin >> LastName;
    cout << "Enter Age:        ";
    cin >> Age;
    
bool saveinformation(char order);
{   
char order;
char moreinfo; 

    cout << "Would you like to save this information";
    cin >> order;
    
        if (order == 'n' || order == 'N')
                {
                   cout << "would you like to add more information (Y/N)";
                   cin >> moreinfo;
                                      
                                      if (moreinfo == 'n' || moreinfo == 'N')
                                         {
                                            return false;
                                         }   
                                      
                                      if (moreinfo == 'y' || moreinfo =='Y')
                                         {
                                           main();
                                          }                              
                }
                
                   if (order == 'y' ||order == 'Y')   
                       {
                       
                       cout << "\nEnter the name of the file you want to create: ";
                           cin >> FileName;
                               ofstream Students(FileName, ios::out);
                                   Students << FirstName << "\n" << LastName << "\n" << Age;
                                       system ("pause");
                                           other();
                                           
                       }
}
}

use std::string's instead of char whatever[]'s! They're much more robust, functional and ... erm good.

how do you use them and implement them in?

im using some vectors but i cant seem to get it to output the name.

any ideas?

Code:

 
  int main()
  {
      char name;
            cout <<("enter first name");
                      cin >> name;

     std::vector< char > v1(name); // copy of name

     std::ostream_iterator< char > output( cout, " " );
 
     cout << "Vector v1 contains: ";
     std::copy( v1.begin(), v1.end(), output );
     
     cout <<endl <<endl;
system("pause");
}

name is a single character in that program. You want a string of characters. You should use string instead of vector. If you are just trying to learn vectors, and are trying to simulate an array of characters, then you'd want to start with the array of characters, or use push_back to add one character at a time to the vector. Learning with vector<int> might be easier, though.