Simple C programming for gaussian

[darwinharianto]

Homework Statement

make a gaussian elimination in C
the one we used on matrix to find x1 x2 and x3
if the matrix is 3x3

Homework Equations

The Attempt at a Solution

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main()
{
    int i,j,k,n;
    float A[3][4]={{3,0,6,1},{4,1,3,2},{6,3,0,3}};
    float x[3],c,sum=0;
    n=2;
    for(i=0; i<=n; i++);
    {
        for(j=0; j<=n+1; j++);
        {
            if(i>j);
            {
                c=A[i][j]/A[j][j];
                for(k=0; k<=n+1; k++);
                {
                    A[i][k]=A[i][k]-A[j][k]*c;
                }
            }
        }
    }
    x[n]=A[n][n+1]/A[n][n];
    for(i=n-1; i>=0; i--);
    {
        sum=0;
        for(j=i+1; j<=n; j++);
        {
            sum=sum+A[i][j]*x[j];
        }
        x[i]=(A[i][n+1]-sum)/A[i][i];
    }
    printf("\nThe solution is: \n");
        for(i=0; i<=n; i++);
        {
            printf("\nx%d=%f\t",i,x[i]);
      }
    return(0);
}

at the end, only x0 and x1 displayed as the solution
should be x0 x1 and x2 right?
and the result

x0=-784.191895

x1=0.000000

seems to be incorrect
anything that i did wrong?
thx for reply[/I][/I][/I][/I][/I][/I][/I][/I][/I]

 

[jedishrfu]

Can you edit your post to use the [ code ] tags?

They will preserve your code indentation without the need for an attachment.

 

[darwinharianto]

Can you edit your post to use the [ code ] tags?

They will preserve your code indentation without the need for an attachment.

how do i do that?
still new in this area

 

[phinds]

how do i do that?
still new in this area

put [C O D E] in front of your code and [/ C O D E] after it (but do NOT include the spaces in the tags. I had to insert them to keep this post from looking like code and hiding the tags.

 

[darwinharianto]

put [C O D E] in front of your code and [/ C O D E] after it (but do NOT include the spaces in the tags. I had to insert them to keep this post from looking like code and hiding the tags.

ok
thanks
just like that right?

 

[SteamKing]

Make a 'gaussian' what in C? Your problem statement is a little vague.

 

[darwinharianto]

Make a 'gaussian' what in C? Your problem statement is a little vague.

gaussian elimination in matrix
sorry its not so clear

 

[darwinharianto]

problem solved
by removing ; after for and if