User Profile

Collapse

Profile Sidebar

Collapse
wuzertheloser
wuzertheloser
Last Activity: Dec 4 '07, 06:55 AM
Joined: Oct 19 '06
Location:
  •  
  • Time
  • Show
  • Source
Clear All
new posts
  • wuzertheloser
    replied to normalization of vectors
    in C
    Found the problem and here is the corrected code =]

    Code:
    #include <stdio.h>
#include <math.h>
void prob1(void);
void prob2(void);

double func(double x);
double unit_vector(double *v, double *w, int num_n);

main()
{
int menu;
printf("There are two functions: prob1() and prob2().\n");
printf("Enter the function number to
    ...
    See more | Go to post

      Leave a comment:

    • wuzertheloser
      started a topic normalization of vectors
      in C

      normalization of vectors

      Use the program skeleton below (starting with #include <stdio.h>)
      as the starting point for quiz4. Add the necessary code to the
      functions prob1() and prob2(), and add the other 2 functions, as
      described in the text below.

      You do not need to change anything in main().

      In void prob1(void), take a double floating-point number x from
      the keyboard and compute the function f(x), which is...
      See more | Go to post
      • wuzertheloser
        replied to help with matrices
        in C
        Okay, here is my code now

        Code:
        #include <stdio.h>
#include <math.h>
double unit_norm(double vec[4], int cols);
void matrix_mult(double a[4][4], double b[4], double c[4], int rows);
main()
{
 double K[4][4] = { { 2., -4.,  1.,  0.},
                    {-4.,  5., -2.,  1.},
                    { 1., -2.,  6., -3.},
                    { 0.,  1., -3.,
        ...
        See more | Go to post

          Leave a comment:

        • wuzertheloser
          started a topic help with matrices
          in C

          help with matrices

          Develop a program which computes the current value of the vector {x}
          based on the following forward iteration:

          {x}(n+1) = [K] {x}(n), n = 0,1,2, ... ,8,9.

          In other words, the next vector {x} is equal to the product of [K] and
          the current vector {x}.

          Perform the matrix multiplication by using the function:

          void matrix_mult(dou ble a[4][4], double b[4], double c[4], int rows);...
          See more | Go to post
          • wuzertheloser
            replied to shadowing a parameter
            in C
            any idea how you would integrate
            A*x^m/n! ?

            mathematically i know how to do it. but the only inputs i'm allowed to have are A, m, and n. Therefore, x would have no defined value.
            See more | Go to post

              Leave a comment:

            • wuzertheloser
              replied to shadowing a parameter
              in C
              program works fine now
              only problem is the output i get for the integral

              my output:

              Enter the exponents (double)m and (int)n in f(x) = A*x^m/n! : 3.25 5

              Enter the coefficient A in f(x) = A*x^m/n! : -1.5

              Enter the bounds for the integration interval, a < b : 1.5 3.75

              Integrate f(x) on [a,b]
              Enter the number of trapezoids : 1000

              The value of the...
              See more | Go to post

                Leave a comment:

              • wuzertheloser
                replied to shadowing a parameter
                in C
                oh just for clarification
                what does the function
                double Intgr() output?

                i need it to output the sum, but i don't think it's doing that.
                See more | Go to post

                  Leave a comment:

                • wuzertheloser
                  replied to shadowing a parameter
                  in C
                  okay, thanks for the help everyone! i appreciate it =] i'll let you know how everything goes.

                  i'm not quite sure which compiler i'm using because it comes from my professor's website.

                  the program is called
                  SSH secure shell
                  and it uses vi editor to make the C files. not sure if that helps.
                  See more | Go to post

                    Leave a comment:

                  • wuzertheloser
                    started a topic shadowing a parameter
                    in C

                    shadowing a parameter

                    Write a program which calculates the integral of the function

                    f(x)=(A*x^m)/n!

                    on the interval from a to b (0<a<b). In the main program, scanf
                    a double value for m and a non-negative integer value for n,
                    a double value of A, and positive double values for a and b>a.
                    Call the function Intgr() to evaluate the integral.

                    Your main program should be followed...
                    See more | Go to post
                    • wuzertheloser
                      started a topic help - closing brakets to make program output correctly
                      in C

                      help - closing brakets to make program output correctly

                      The correct program should look like this:

                      Total number of voting cards: 55

                      Votes for candidate 1: 1
                      Votes for candidate 2: 10
                      Votes for candidate 3: 8
                      Votes for candidate 4: 13
                      Votes for candidate 5: 8
                      Votes for candidate 6: 12
                      Votes for candidate 7: 3

                      Percent votes for Mr. Adams : 1.82 %
                      Percent votes for Mr. Camacho : ...
                      See more | Go to post
                      • wuzertheloser
                        started a topic Help with data files
                        in C

                        Help with data files

                        Define the file-pointers *Infile and *Outfile and link them to
                        a given input file Sale.dat (which is in the homework/directory)
                        and the output file Comm.dat (which you will create in this
                        assignment). Use while(fgets()!= NULL) to read all the lines in
                        Sale.dat. For odd number lines (containing full names) sscanf
                        name and surname, print the full name on the screen and in
                        the output file Comm.dat. For even number...
                        See more | Go to post
                        • wuzertheloser
                          started a topic can someone check this for me?
                          in C

                          can someone check this for me?

                          sum += pow(-1., (double)n) * ((pow((2. * angle_rad),(2. * (double)n))) / factori
                          al);
                          value = 0.5 * (1 + sum);


                          this is the equation i wrote out for

                          cos^2(x)=0.5*(1 +Sum[(-1)^n (2*x)^(2n)/(2n)!])

                          assuming i set up all the variables correctly, does this seem right?
                          See more | Go to post
                          • wuzertheloser
                            replied to Using Taylor Series
                            in C
                            This is my program so far. I got the factorial to work.


                            #include <stdio.h>
                            #include <math.h>
                            #define PI 3.141592654

                            main()
                            {
                            int n_terms, n=0;
                            double angle_deg, angle_rad, csa, csa2, value, sum, factorial;
                            printf("\n\nPar t A:\nCalculation of True and Approximate Values of cos^2(x)\n\n");
                            printf("Enter x_deg: \n");
                            scanf("%lf",...
                            See more | Go to post

                              Leave a comment:

                            • wuzertheloser
                              replied to Using Taylor Series
                              in C
                              okay, i tried to do what you said. this is the code i came up with.

                              #include <stdio.h>
                              #include <math.h>
                              #define PI 3.141592654

                              main()
                              {
                              int n_terms, n=0;
                              double angle_deg, angle_rad, csa, csa2, value;
                              printf("\n\nPar t A:\nCalculation of True and Approximate Values of cos^2(x)\n\n"
                              );
                              printf("Enter x_deg: \n");
                              scanf("%lf",...
                              See more | Go to post

                                Leave a comment:

                              • wuzertheloser
                                replied to Using Taylor Series
                                in C
                                okay thanks
                                i'll see if that works and update if it does or not =]
                                See more | Go to post

                                  Leave a comment:

                                • wuzertheloser
                                  replied to Using Taylor Series
                                  in C
                                  sorry, i'm new to programming
                                  could you give like a simple example of how to do it? how many double / float values would i need to define?
                                  See more | Go to post

                                    Leave a comment:

                                  • wuzertheloser
                                    started a topic Using Taylor Series
                                    in C

                                    Using Taylor Series

                                    I need help with Taylor Series

                                    Part A:
                                    Scan the angle in degrees x_deg. Express this angle in
                                    radians by using x=PI*x_deg/180, and calculate Y=cos^2(x)
                                    by using the math.h library of functions (pow() and cos()
                                    functions). Compare the so calculated value of Y=cos^2(x)
                                    with the approximate value y obtained by using n_term
                                    terms of the Taylor series

                                    ...
                                    See more | Go to post
                                    • wuzertheloser
                                      replied to how to stop program after input
                                      in C
                                      program works exactly the way it should now
                                      thank you sooooo much =]
                                      See more | Go to post

                                        Leave a comment:

                                      • wuzertheloser
                                        replied to how to stop program after input
                                        in C
                                        one last question. now that i have the loop to work, i need the program to recognize whether or not the value inputed has been used in an interval already. If it has, then the program needs to tell the user to input from another interval like so:

                                        iacs5.ucsd.edu% a.out
                                        Enter (double) A, B, C:
                                        1.5 -2.1 0.5

                                        Enter (double) x:
                                        -0.75
                                        Case 1
                                        x value is = -0.750 and y value is = -1.45781...
                                        See more | Go to post

                                          Leave a comment:

                                        • wuzertheloser
                                          replied to how to stop program after input
                                          in C
                                          Thanks! Program works with loop now! if i have any other questions, i'll post =]
                                          See more | Go to post

                                            Leave a comment:

                                          No activity results to display
                                          Show More
                                          Working...