Plzz help.

[thashiznitov]

Idn how to solve some questions.

i need to do them in c++ and i have no idea how to do it

1): write program to c++ to read three numbers from keyboard and find the average of the three numbers?

2): write program c++ to read two numbers from keyboard and swap between numbers like x=4; y=6; the result x=6; y=4;?

I think that int can do that job. but im not sure.

3): must be the result of positive example: (x+(-y)=z)?

with abs ?

4): values for each of : X= ;y= ;z= ;

[MrHutch]

At least make a start. Have you got code for question one?

One thing you'll quickly discover on these forums is that nobody is willing to do your homework for you.

[danielmtnz]

So what would you need to do in order for you to have the user input 3 numbers? Also how does one find the average?

Same for the second question.

How does one ask the user to input two numbers then swap their values?
There is a syntax for swapping in C++ but I'm not sure if you've learned it yet.

First give it a try and post up the code you have so far..

[thashiznitov]

#include <iostream>
#include <cmath>
#include <fstream>
#include <string>

using namespace std;


void main ()
{
int x,y,z;
x=3;
y=6;
z;

z=3+6;

cout << " the result is " << z <<endl;

system ("pause");

}

[thashiznitov]

#include <iostream>
#include <cmath>
#include <fstream>
#include <string>

using namespace std;


void main ()
{
int x=3;
int y=6;

x=y;

x=7;

cout << "x" << x <<endl;
cout << "y" << y <<endl;




system ("pause");

}


" swap between numbers like x=4; y=6; " << --- Thats how i did it. But idn if that realy is "swap"

[Sadegh2007]

use this maybe help you
(value by reference) your x,y change in main scope

void swap (int & x, int & y){
	int tmp = x;
	x = y;
	y = tmp;
}

[thashiznitov]

Sadegh2007.

That dont work..

[thashiznitov]

#include <iostream>
#include <fstream>
#include <cmath>
#include <string>

using namespace std;

void swap (int & x, int & y)


{
int tmp = x;
x = y;
y = tmp;

system ("pause");
}


It gives 2 errors.