C++ Experts please help: Solving for X & linear equations with C++??

[HypeBeast McStreetwear]

Hello everyone. I got a assignment that states.

The set of linear equations
a11X1 = a12X2 = c1
a21X1 = a22X2 = c2

May be solved using Cramer’s rule:
X1 = c1a22 – c2a12
a11a22 – a12a21

X2 = c2a11 – c1a21
A11a22 – a12a21

Use these equations to design, write, compile, execute and debug a program that will solve for X1 and X2 in the following equations.

3X1 + 4X2 = 40
5X1 = 2X2 = 34

Alright the question I have is how do begin? I'm new to the whole program and I have to admit I don't have the slightest clue what to do. This what I've got so far and I don't know where to go from here:

#include <iostream>
using namespace std;


int main()
{
double float,
return 0;
}

:-/

BTW, I use Visual C++ 2008 Express Edition if that matters.

Someone please help me. Thanks in advance.

[JosAH]

If you have a 2x2 matrix and a vector (arrray) with two elements
you have to write the following functions:

double a[2][2]; /* the matrix */
double c[2]; /* the rhs vector */
...
void swap(int index);
double det();
 

The swap function swaps column 'index' with vector c and the det
function calculates the determinant of matrix a. On top of that
you need a bit of code to read the matrix and vector values
and print some results.

kind regards,

Jos