This simple DOS app sovles a system of linear equations using the Gauss-Jordan method. It is possible to solve a system of up to 40 equations in 40 unknowns, although a system that large would be cumbersome with the basic keyboard i/o system used here.

Total pivoting is used to reduce the numerical round-off errors to the smallest possible values.

The program first prompts for the number of equations (N). It then prompts for each of the coeficients in the N equations. Next, it displays the augmented matrix which it is going to solve, and allows the user to change one of the coefficients if needed. Next, the user is prompted for a file name to save the solution vector. If a zero is entered, the solution vector is displayed on screen instead of being saved. Finally, the entire reduced matrix is displayed on screen.

The program was compiled in Borland turbo C++ version 1.0, and the source code is available below.

The author (Greg Adams, Moorestown Microwave Co.) reserves no rights, and assumes no responsibility for the use of this code.

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