Programming Forums - Program I did for a class today...did I do it correctly?

Instructions:

I. The program asks for the user to input the magnitudes and angles (with respect to X-axis) for two vectors, A and B. It then calculates the resultant vector (R) by summing the X- and Y-components of the two vectors, and prints the magnitudes, and angles (with respect to X-axis) of the vectors A, B, and R on the screen in the format given below.

II. Helpful Math Hints
Rad_A = Deg_A * PI/180

Rx = A cos (rad_A) + B cos(rad_B)
Ry = A sin (rad_A) + B sin(rad_B)

R = √ (Rx^2 + Ry^2), and rad_R = [atan(Ry/Rx)*180/PI]

III. Helpful Programming Hints:

1. Preprocessor define PI = 3.14159
2. Define variables A, B, R, deg_A, rad_A, deg_B, Rad_B, deg_R, rad_R, Rx, Ry as "double/or float"
3. Ask user to enter A in newtons, read the value and assign to A; ask to enter deg_A in degrees, read the value (scan in lf format/or float number as appropriate) and assign to deg_A, and so on...for all the input variables.
4. Computer the rad_A, rad_B, and computer the components (Rx and Ry) of the resultant (R):
5. Computer the resultant vector's magnitude: R = √ (Rx^2 + Ry^2)
6. Compute the resultant vector's directions in degrees:

#include <stdio.h>

#include <math.h>

#define PI 3.14159



int main()

{

double A,B,R,deg_A,rad_A,deg_B,rad_B,deg_R,rad_R,Rx,Ry;



printf("*My name* 2441203 SA33\n");

printf("ESC151 Spring 08\n");

printf("Recitation 1 Jan 28, 2008\n\n\n");





printf("Enter magnitude of A in newtons \n");

scanf("%lf", &A);

printf("Enter direction of A in degrees \n");

scanf("%lf", &deg_A);

printf("Enter magnitude of B in newtons \n");

scanf("%lf", &B);

printf("Enter direction of B in degrees \n");

scanf("%lf", &deg_B);



rad_A=deg_A*PI/180;

rad_B=deg_B*PI/180;

Rx=A*cos(rad_A)+B*cos(rad_B);

Ry=A*sin(rad_A)+B*sin(rad_B);

R=sqrt(Rx*Rx+Ry*Ry);

deg_R=atan(Ry/Rx)*180/PI;



printf("Force(N)                                Direction(degrees) \n");

printf("A %lf                                        %lf\n",A,deg_A);

printf("B %lf                                        %lf\n",B,deg_B);

printf("R %lf                                        %lf\n:,R,deg_R);



        return 0;



}