Thread: iostream.h functions not working!

I can't get any iostream functions to work, when I run the program there is no output except for stdlib.h functions.

My source code is posted the the tread : "Can't figure out this darn linker!"

Can't find that thread.

You might wanna try #include <iostream> if its not there already.

Also make sure your >> are facing the right direction.

std::cout << "Hi\n";
std::cin >> x

Thread is here.

Use the standard version of Iostreams (as zdude mentioned), and replace / with \ in control characters (\n, \t, not /n, /t).

I changed all the slashes and tried the standard versions of cout<< and cin>>, but it still will not work.

I'm using Dev-C++ version 4, if it's the complier, please let me know.

I'll try that zornthrohacker, but here is the code

Code:

#include <iostream.h>
#include <stdlib.h>
#include <DineOut.h>

int main()
{
 int DineOut;
 int YearBorn;
 int FinalNumber;
 int HaveYouHadBirth;

 std::cout<<"DINING OUT MATHEMATICS.\n\n";
 system("PAUSE");
 std::cout<<"\n";
 cout<<"\t"<<"Here is some really neat math!\n";
 cout<<"\a\v";
 cout<<"First, enter the number of times that \n";
 cout<<"you would like to dine out a week.\n";
 cout<<"(This number must be >1 but <10.)";
 cout<<"\n\n\t";
 cin>>DineOut;
 cout<<"\n\n";
 cout<<"Now, we will multiply this number by 2.\n";
 cout<<"(Just to be bold!)";
 cout<<"\n\n\t";
 cout<<DineOut<<" x 2 = "<<Twice(DineOut)<<"\n\n";
 system("PAUSE");
 cout<<"\n\n";
 cout<<"Now, we will add 5 for Sunday.";
 cout<<"\n\n\t";
 cout<<DineOut<<" + 2 = "<<AddFive(DineOut)<<"\n\n";
 system("PAUSE");
 cout<<"\n\n";
 cout<<"Now Multiply it by 50.";
 cout<<"\n\n\t";
 cout<<DineOut<<" x 50 = "<<FiftyTimes(DineOut)<<"\n\n";
 system("PAUSE");
 cout<<"\n\n";
 cout<<"Now, if you've had your birthday, please press 1. ";
 cout<<"\n"<<"If you haven't, please press two.";
 cout<<"\n\t";
 cin>>HaveYouHadBirth;
 if (HaveYouHadBirth==1)
 {
 cout<<"\n\n";
 cout<<"Since you've had your birthday, we'll add 1753.";
 cout<<"\n\n\t"<<DineOut<<" + 1753 = "<<HadBirth(DineOut);
 cout<<"\n\n";
 system("PAUSE");
 }
 else if (HaveYouHadBirth==2)
 {
 cout<<"\n\n";
 cout<<"Since you haven't had your birthday, we'll add 1752.";
 cout<<"\n\n\t"<<DineOut<<" + 1752 = "<<NotHadBirth(DineOut);
 cout<<"\n\n";
 system("PAUSE");
 }
 else
 {
 cout<<"You have not entered a valid number.\a\n\a\n";
 system("PAUSE");
 cout<<"This program will therefore not work correctly.";
 }
 cout<<"\n\n";
 cout<<"Now, enter the year you were born.";
 cout<<"\n\n\t";
 cin>>YearBorn;
 cout<<"\n\n";
 cout<<"Now, we will subtract the year you were born.";
 FinalNumber=DineOut - YearBorn;
 cout<<"\n\n\t"<<DineOut<<" - "<<YearBorn<<" = "<<FinalNumber;
 cout<<"\n\n";
 system("PAUSE");
 cout<<"\n\n";
 cout<<"Finally, you should be left with a three digit number.";
 cout<<"\n\t"<<FinalNumber;
 cout<<"The first digit is the number of times you would like to\n";
 cout<<"dine out a week.\n";
 cout<<"The last two numbers are:\n"<<"duh duh duh duuuuuuuuuhhhhhhh!!!\n";
 cout<<"YOUR AGE!!! HAHAHA!!!";
 system("PAUSE");
 return 0;


}

Here is DineOut.h:

Code:

class DineOut
{
 public:
 double FiftyTimes(double x);
 double Twice(double x);
 double AddFive(double x);
 double HadBirth(double x);
 double NotHadBirth(double x);

 protected:
 double x;
};

double FiftyTimes(double x)
{
 return x*50;
}

double Twice(double x)
{
 return x*2;
}

double AddFive(double x)
{
 return x+5;
}

double HadBirth(double x)
{
 return x+1753;
}

double NotHadBirth(double x)
{
 return x+1752;
}

reinstalling did not work

changed to:

Code:

 
#include <iostream>
#include <cstdlib>
#include "DineOut.h"

int main()
{
 using namespace std;

...

It still will not work.

Well, try out this:

Code:

#include <iostream>
#include <cstdlib>

int main(){
    using namespace std;
    cout << "Hello World" << endl;
    system("pause");
}

Does THAT work?

One thing to note; cout can take as long as it wants to actually write to the screen. endl explicitly forces it to write to the screen (it flushes the output). So the above code will ALWAYS have the following output:

Hello World
Press any key to continue.

But this code:

Code:

#include <iostream>
#include <cstdlib>

int main(){
    using namespace std;
    cout << "Hello World" << "\n";
    system("pause");
}

MIGHT have that output, but might also have this output:

Press any key to continueHello World

I even tried that, it must be something to do with the complier, or maybe iostream.h got messed up.

Is it actually compiling and not printing, or is there some compiler error?

It's actually compiling and not printing, it used to have a linker problem, but it's not showing one anymore.

Is there anyone who can try the program and see if it works for them?

If you don't have any std::endl's, put a std::cout.flush() in right before system("pause")... See if that does anything.