declaring three double variables

[elementx2z]

Hello! I need help writing a program for a class, im having a lot of trouble comprehending with this because this is all new to me, the two main objectives are these:

It first declare three double variables: a, b, and c.
Then it asks the user for three numbers, and assign them to a, b and c respectively. Then it computes the sum and product of the three numbers.

Before printing out each of the sum and product, it should announce what is being calculated. Below is a sample input and output of the program, where the user entered the numbers 3.4, 5.6 and 4.3. There, user inputs are indicated with underlines for a presentation purpose.

Any help would be great, thanks in advance!

[Galik]

Why don't you have a go and show us what you come up with? Then we can advise you where you are going wrong.

[elementx2z]

This is what I have so far.

#include <iostream>
using namespace std;

int main()
{
double x = 5.4;
double y = 4.3;
double z;

z = x / (double) y;

cout << x << " + " << y << " = " << z << endl;



system("pause");
return 0;
}

[Galik]

Okay, well now you need to ask the user to supply the values of your doubles. You can do that using cin >> d; where d is a double.

[elementx2z]

im still very confused on how to go on from there, can you possibly help code the first part of it please :/ ?

[Athar]

How about starting at the beginning?

1. It first declare three double variables: a, b, and c.
2. Then it asks the user for three numbers, and assign them to a, b and c respectively.
3. Then it computes the sum and product of the three numbers.

If you have problems with any of these points, ask again.
If not, repeat this for the remaining points.

[kaduuk]

by the way, you can also declare these doubles by using:

double x=5.4, y=4.3, z;

and instead of system("pause") use cin.ignore(numeric_limits<streamsize>::max(), '\n');
This might seem intimidating, but it's a better way to do the same (and faster).. ( see: http://www.cplusplus.com/forum/articles/11153/ )

Also, in the line with z=x/(double) y; you can remove the (double)

Anyway, first try to do what Athar said, and if you need any extra help, feel free to ask :)

Hope it helps!

Cheers!

[elementx2z]

Hey guys, thanks for all the help, you've pushed me in the right direction. I just have two simple (noob) questions, how to I make the users input become underlined for the presentational purpose? Also, is there a way I can space out the lines in the debug screen so it doesn't look cluttered? thank you :)

Here is what I have:

#include <iostream>
using namespace std;

int main()
{
//Declare 3 double variables for input and another 2 for the sum and product
double gab1, gab2, gab3, sum, prod;

//ask for value 1
cout<<"Enter value 1: ";

//cin assigns the input to the variable
cin>>gab1;

cout<<"Enter value 2: ";
cin>>gab2;

cout<<"Enter value 3: ";
cin>>gab3;

// Sum of the three double variables

sum = gab1 + gab2 + gab3;

// Show the sum of the three double variables

cout<<"The sum of "<< gab1 << " and " <<gab2<<" and "<<gab3<<" = "<<sum<<"\n";

// Calculate and show the product
prod = gab1 * gab2 * gab3;

cout<<"The product of "<< gab1 << " and " <<gab2<<" and "<<gab3<<" = "<<prod<<"\n";

system("pause");
return 0;

}

[kaduuk]

I don't think you can underline, bold or make text italic with standard ASCII..

[deems]

Try '\b' at the end of your cout statement right before grabbing input.
Each time \b is placed a blank line is inserted that gets overridden which each character entered.

ex: cout<<"Enter value 1: \b\b\b";

Will have 3 spaces of line in the console.

Edit: It might also be something like this:
ex: cout<<"Enter value 1: ___\b\b\b";

\b back spaces the cursor on each call.