Confused and cant get my head around this

[Faaz]

Hey, If anyone can help me with this.

Write a program that reads in a sequence of integers provided by the user, and then, when the user enters a negative integer, displays the sum of all the previous positive ones. (S) YOU MUST NOT use an array to save the all the entered numbers – you do not need to.

I can figure it out if I had to use an array but without using an array cant even think.

I have wrote the program and it can take the numbers till the user enters a negative number but then I don't know what to do.


Any suggestions are welcome just to point me in the right directions.




Thanks

[gaorozcoo]

Please post the program you have written so we can help you. Please remember to use code tags.

[coder777]

You need 2 variables: 1 that holds the total addition (starts with 0) and the 2. is the entered number. Then you need an if that checks whether the entered number is positive (-> add to total) or negative (-> break the loop)

[Faaz]

Here is the code although u might have problems as I'm using Gwin its just a stupid C++ complier although I understand normal c++ so just help me the normal C++.


this is what it bascially means when you write from Gwin to normal C++


cin>>x;
cout<<x;


by (assuming x is an int)


x= Gwin.readInt();
Gwin.writeInt(x);


int main()
{
int number = 0;
int n = 0;
int numbersum = 0;
int a,b,c,d,e,f,g,h;

GWindow Gwin;

// Clear the Gwin window
Gwin.clear();

Gwin.setPenColour(BLACK);

while (number>=0)
{
Gwin.clear(); // Clears window for new entry
Gwin.setPenColour(BLACK); // set pen colour to black i.e. font = black

Gwin.writeText(20, 20, "Enter sets of numbers: "); // writes on the screen asking user to enter number

number = Gwin.readInt(); // Reads the number enetered and saves it in int number

}

Gwin.writeText(20, 40, "Sum = "); // writes on the screen
Gwin.writeDouble (90,40,number); // displays the value in int number


// Finally, wait for a key to be pressed
Keyboard.waitKey();

return 0;
}


I know the code above will never get me the right answer because its just not adding anything but i just dont know how to get the previous entered number to add

[gaorozcoo]

Try this and let me know

cin>>x;
cout<<x;

by (assuming x is an int)

x= Gwin.readInt();
Gwin.writeInt(x);

int main()
{
	int number = 0; 
	int n = 0;
	int numbersum = 0;
	int a,b,c,d,e,f,g,h;
	
	//added by gaorozcoo
	long accumulator=0;
	//////////////////////

	GWindow Gwin;

	// Clear the Gwin window
	Gwin.clear();

	Gwin.setPenColour(BLACK); 

	for(;;)	//while (number>=0)
	{

		Gwin.clear(); // Clears window for new entry
		Gwin.setPenColour(BLACK); // set pen colour to black i.e. font = black

		Gwin.writeText(20, 20, "Enter sets of numbers: "); // writes on the screen asking user to enter number 

		number = Gwin.readInt(); // Reads the number enetered and saves it in int number
		
		//added by gaorozcoo
		if(number>=0){
			accumulator+=number;
		}else{
			break;
		}
		/////////////////////////

	} 

	//Now you can print the variable accumulator.
	
	Gwin.writeText(20, 40, "Sum = "); // writes on the screen
	Gwin.writeDouble (90,40,number); // displays the value in int number


	// Finally, wait for a key to be pressed
	Keyboard.waitKey();

	return 0;
}

[Faaz]

sorry no it don't work it just shows the last value like it use to do it previously

[coder777]

Line 50 must be: Gwin.writeDouble (90,40,accumulator); // displays the accumulator

[gaorozcoo]

Sorry, please change line 50 of the code I sent you

change

Gwin.writeDouble (90,40,number);

to

Gwin.writeDouble (90,40,accumulator);

[Faaz]

sorry internet was down for 2 days but it works THANKS!! was doing my headin and learnt something new!