Console Disapear!

Hey, im new to the C++ Language, and i got a book for X-mass (Accelerated C++) where it shows one of the easyest codes, but there is something strange with my console, it disapears after i type in my first name! what to do

Code:

---

#include <iostream>
#include <string>

int main()
{
        // Ask for a persons name
        std::cout << "Please enter your first name: ";
       
        // Read the name
        std::string name;    // define name
        std::cin >> name;    // read into name
       

        // Write a greetings
        std::cout << " Greetings,  " << name << "! have a whonder full time with accelerated c++" << std::endl;
       
        return 0;
       
}

---

i tryied with cin.get() too but then the first letter in my name whont show

Code:

---


#include <iostream>
#include <string>

int main()
{
        // Ask for a persons name
        std::cout << "Please enter your first name: ";
        std::cin.get();
        // Read the name
        std::string name;    // define name
        std::cin >> name;    // read into name
        std::cin.get();

        // Write a greetings
        std::cout << " Greetings,  " << name << "! have a whonder full time with accelerated c++" << std::endl;
        std::cin.get();
        return 0;
       
}

---

any help would be apritiated

You can try using a std::cin.ignore() before the std::cin.get(). Alternatively, you can ditch both those extra statements and just run your program from the command line.

ok thanks:) take care

the reason it's disappearing is because it doesn't require any input from the user. it prints what it has to and then exits sucesfully. because you (i'm assuming) double clicked on the program instead of running it from the console, it exits and takes the console with it.

as laserlight said, you could either get input from the keyboard at the end of the program or you could run it directly from the command line.

just so's you know, you can use the

Code:

---

using namespace std;

---

which makes it alot easier to program in my opinion....

Code:

---

#include <iostream>
#include <string>
// namespace
using namespace std;

int main()
{
        // Ask for a persons name
        cout << "Please enter your first name: ";
        cin.get();
        // Read the name
        string name;    // define name
        cin >> name;    // read into name
        cin.get();

        // Write a greetings
        cout << " Greetings,  " << name << "! have a whonder full time with accelerated c++" << endl;
        cin.get();
        return 0;
       
}

---

hope this helps

start / run / type cmd
drag your program in to the black window bobs your uncle

std::system("PAUSE") is nice non-portable code for Windows.

Quote:

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Originally Posted by beene

just so's you know, you can use the

Code:

---

using namespace std;

---

which makes it alot easier to program in my opinion....

Code:

---

#include <iostream>
#include <string>
// namespace
using namespace std;

int main()
{
        // Ask for a persons name
        cout << "Please enter your first name: ";
        cin.get();
        // Read the name
        string name;    // define name
        cin >> name;    // read into name
        cin.get();

        // Write a greetings
        cout << " Greetings,  " << name << "! have a whonder full time with accelerated c++" << endl;
        cin.get();
        return 0;
       
}

---

hope this helps

---

I strongly advise not to do so. It's against the whole purpose of namespaces.. The purpose of having things in namespaces is to avoid name collision (i.e. a function named max() and a variable named max). Including the whole std namespace brings name collisions quite often. Using the std:: prefix is a nice way to access the contents of the namespace std. If you absolutely can't bear typing those extra 5 characters, you can use 'using std::something' which includes only parts of the namespace in the global namespace but this is still not as good as typing std:: everytime. It's not easier at all, it's just faster not to type it... until you step into a bug caused by name collision.

thanks 4 all advise's :)

The reason your std::cin.get() was not working was because you added too many to your program. What std::cin.get() does is read a character from the input stream. In your second piece of code you have this:

Code:

---

        // Ask for a persons name
        std::cout << "Please enter your first name: ";
        std::cin.get();

---

That asks for a name, then reads a single character. That is why the first character is missing, the std::cin.get() is reading it and ignoring it.

What you should be doing is adding a std::cin.get() or std::cin.ignore() only after you call std::cin >> to read in data, and then once at the end of your program to keep the window open.

The reason that is necessary is that when the user is entering their name into your program, they will type the name and hit <enter>. Typing <enter> adds a newline character to the input. When you read in data with std::cin >>, it stops at the newline character and leaves it there for later. Calling std::cin.get() or std::cin.ignore() once will ignore that newline. Calling it again will cause the code to wait for the user to hit <enter> again. So the final code should look like this:

Code:

---

#include <iostream>
#include <string>

int main()
{
        // Ask for a persons name
        std::cout << "Please enter your first name: ";

        // Read the name
        std::string name;    // define name
        std::cin >> name;    // read into name
        std::cin.get();

        // Write a greetings
        std::cout << " Greetings,  " << name << "! have a whonder full time with accelerated c++" << std::endl;
        std::cin.get();
        return 0;
       
}

---