little Billing pack

[Face]

I wrote little code.I will use this new topic to make some changes in it.Because our C++ topic is becoming bigger & bigger.

Here is my little code

Code: Select all

//G-sparkz little billing Pack Devoloped

#include<iostream>

using namespace std;

int main()
{
    int Paper,Quantity,Total;
    char Name[50];
    
    cout<<"Welcome to G-sparkZ Billing Pack"<<endl<<endl;
    
    cout<<"Please enter your name"<<endl;
    cin>>Name;
    cout<<Name <<" entered the G-SparkZ Billing system "<<endl<<endl;
    
    cout<<"Paper size codes [ A4=4 A3=3 ] "<<endl<<endl;
    cout<<"Enter your paper size code ";
    cin>>Paper;
    
    if(Paper==4)
    Paper=5;
    else if (Paper==3)
    Paper=10;
    else
    cout<<"wronge paper";
    
    cout<<"How many pages ";
    cin>>Quantity;
    
    cout<<"paper - A"<<Paper<< " Pages - "<< Quantity<<endl;
    
    Total=Paper*Quantity;
    
    cout<<"Total price - "<<Total<<endl;
    
    system("pause");
    }

I wanna do some changes here.

1.I wanna stop my program if user input wrong paper code.
2.I wanna make some empty lines after "how many pages line"& after entering my name G-sparkZ.

billing 1.png (13.78 KiB) Viewed 6501 times

[Nipuna]

1.I wanna stop my program if user input wrong paper code.

For that you have to add

Code: Select all

If

Command or something like that. but I didn't studied those yet.

Others will help you

[Face]

Yeah,nipuna.
I am waiting for NEO

[Neo]

Code: Select all

void main()
{
    int Paper,Quantity,Total;
    char Name[50];
   
    cout<<"Welcome to G-sparkZ Billing Pack"<<endl<<endl;
   
    cout<<"Please enter your name"<<endl;
    cin>>Name;
    cout << "\n\n\n\n" <<Name <<" entered the G-SparkZ Billing system "<<endl<<endl;
   
    cout<<"Paper size codes [ A4=4 A3=3 ] "<<endl<<endl;
    cout<<"Enter your paper size code ";
    cin>>Paper;
   
    if(Paper==4){
		Paper=5;
	}
    else if (Paper==3){
		Paper=10;
	}
    else{
		cout<<"wronge paper" << endl;
		return;
	}
   
    cout<<"How many pages " << "\n\n\n";
    cin>>Quantity;
   
    cout<<"paper - A"<<Paper<< " Pages - "<< Quantity<<endl;
   
    Total=Paper*Quantity;
   
    cout<<"Total price - "<<Total<<endl;
   
    system("pause");
}

Notice I have added multiple "\n" to make multiple end lines. "\n" is equals to endl.
You can also put multiple endls as well. Ex: << endl << endl << endl.......

The other one is "return;". See I used it after "wrong paper" to exit the application form there without proceeding further.
Note that I changed "int main()" to "void main()" again. Do not use anything without a meaning.
However, if you use int main(), make sure to use return x; where x is a number.

Good luck!

[Face]

Thanks NEO.But I wanna stop my program when user input a wrong code * display wrong code.When I use return it exits when press enter.

[Neo]

Yes...

Find code,

Code: Select all

      cout<<"wronge paper" << endl;
      return;

Replace with,

Code: Select all

      cout<<"wronge paper" << endl;
      system ("pause");
      return;

[Nipuna]

Hey G-sparkZ

Can you remember that I told you about

Code: Select all

If

?

Thanks Neo for Helping Us. But I couldn't study C++ in these days. If I did I would help here according to my Knowledge.

And I am Also confused about some things such as the return thing and the void main thing and int main thing
Those Feel Me that i didn't studied well.
Can you Explain Me those in Simple words or in Sinhala You are doing Great work because you try to Explain everything you know that related to those Stuffs. But I like to know them in Simple language. Can you tell me those without getting mad? Because I asked this i think in lankatalk too.

Thanks

[Neo]

And I am Also confused about some things such as the return thing and the void main thing and int main thing
Those Feel Me that i didn't studied well.
Can you Explain Me those in Simple words or in Sinhala You are doing Great work because you try to Explain everything you know that related to those Stuffs. But I like to know them in Simple language. Can you tell me those without getting mad? Because I asked this i think in lankatalk too.

See https://robot.lk/viewtopic.php?f=8&t=2053