DaniWeb Forum Index > Software Development > C

C RSS

Need HELP!!!!!

•

Join Date: Aug 2008

Posts: 3

Reputation: dummy programer is an unknown quantity at this point

Solved Threads: 0

dummy programer dummy programer is offline

Offline

Newbie Poster

Need HELP!!!!!

Aug 2nd, 2008

I NEED HELP WITH THIS PROBLEM!!!! ANYONE!!!!

/*3. Write the function: double max_norm(double *v, int n) to compute
the maximum norm of vector v[] with n elements. The max norm of a vector is
computed by taking the maximum absolute value of its elements.
In prob3() compute x1[]=a[][]*x0[], call max_norm() to compute the max_norm
x1[]. In order to normalize (or convert it to a unit vector), divide each
element of x1[] by the norm. Print the normalized x1[] using %12.4e. Then
copy x1[] as x0[] (to perform updating) and repeat the process nine more times
. */
double a[5][5]={ 1.0, 0.2, 0.6, 0.3,-0.2,
0.2, 3.0,-0.1, 0.2, 0.7,
0.6,-0.1, 2.0, 0.7, 0.1,
0.3, 0.2, 0.7, 5.5, 0.2,
-0.2, 0.7, 0.1, 0.2, 4.5 };
double x1[5], x0[5]={0.1, -0.5, 0.1, 1.0, 0.9};

•

Join Date: Dec 2006

Posts: 2,028

Reputation: Aia has much to be proud of

Solved Threads: 175

Aia

Offline

Postaholic

Re: Need HELP!!!!!

Aug 2nd, 2008

Exactly, where are you having problems with?
Be more specific and post relevant portion of code you have tried already and it is not working.

•

Join Date: Aug 2008

Posts: 3

Reputation: dummy programer is an unknown quantity at this point

Solved Threads: 0

dummy programer dummy programer is offline

Offline

Newbie Poster

Re: Need HELP!!!!!

Aug 2nd, 2008

I'm completely lost....I don't understand how to write the first function then call on it???

•

Join Date: Jul 2008

Posts: 2,001

Reputation: ArkM has much to be proud of

Solved Threads: 343

ArkM

Offline

Postaholic

Re: Need HELP!!!!!

Aug 2nd, 2008

...then ask your teacher to divide your homework grade by 2 and send the second half to the author of the best answer...

•

Join Date: Aug 2008

Posts: 3

Reputation: dummy programer is an unknown quantity at this point

Solved Threads: 0

dummy programer dummy programer is offline

Offline

Newbie Poster

Re: Need HELP!!!!!

Aug 2nd, 2008

/*3. Write the function: double max_norm(double *v, int n) to compute
the maximum norm of vector v[] with n elements. The max norm of a vector is
computed by taking the maximum absolute value of its elements.
In prob3() compute x1[]=a[][]*x0[], call max_norm() to compute the max_norm
x1[]. In order to normalize (or convert it to a unit vector), divide each
element of x1[] by the norm. Print the normalized x1[] using %12.4e. Then
copy x1[] as x0[] (to perform updating) and repeat the process nine more times. */

 Help with Code Tags 
 C Syntax (Toggle Plain Text) 
        double a[5][5]={ 1.0, 0.2, 0.6, 0.3,-0.2,
                         0.2, 3.0,-0.1, 0.2, 0.7,
                         0.6,-0.1, 2.0, 0.7, 0.1,
                         0.3, 0.2, 0.7, 5.5, 0.2,
                        -0.2, 0.7, 0.1, 0.2, 4.5 };
        double x1[5], x0[5]={0.1, -0.5, 0.1, 1.0, 0.9};
// ***Enter your statements
        int i, k;
        double dot;
        for(i=0; i<5; i++){
                for(k=0, dot=0.0; k<5; k++){
                        dot +=a[i][k] * x0[k];
                        x1[i]=dot;
                }
        }
 
        return;
}
double max_norm(double *v, int n)
{
// ***Enter your statements
 
 
return;
}
        double a[5][5]={ 1.0, 0.2, 0.6, 0.3,-0.2,
                         0.2, 3.0,-0.1, 0.2, 0.7,
                         0.6,-0.1, 2.0, 0.7, 0.1,
                         0.3, 0.2, 0.7, 5.5, 0.2,
                        -0.2, 0.7, 0.1, 0.2, 4.5 };
        double x1[5], x0[5]={0.1, -0.5, 0.1, 1.0, 0.9};
// ***Enter your statements
        int i, k;
        double dot;
        for(i=0; i<5; i++){
                for(k=0, dot=0.0; k<5; k++){
                        dot +=a[i][k] * x0[k];
                        x1[i]=dot;
                }
        }

        return;
}
double max_norm(double *v, int n)
{
// ***Enter your statements


return;
}