Write a program to print five tables (5) displaying the range that a ball would travel when it is thrown with an initial velocity v0 and angle θ.
One table should be calculated for each of the initial velocities: 0, 1, 10, 100, and 1000 meters per second.
The table should have one row for e very 5 degrees for angles between 5 and 85 degrees inclusive.
Note that this assignment does not require a READ statement since all data required can be constructed into the program.
Nested DO loops are required to solve this problem. Do not unnecessarily duplicate code.
Columns should have appropriate headings.
White space should separate the tables.
Do not use formatted Output for the program.
implicit none
! Declare constants
REAL, PARAMETER :: gravity = 9.81, pi=3.14159
! Declare variables
REAL :: velocity_initial
REAL :: range, alpha
INTEGER :: angle
! Display initial header
WRITE (*,*)
WRITE (*,*) "displaying the range that a ball would
travel"
WRITE (*,*)
! Initialize variables
velocity_initial = 0, 1, 10, 100 ,1000
! loop over all specified angles
loop: do angle = 5, 85, 5
! Covert angle(degree) to to radians
alpha = angle * pi / 180.0
! Calculate range of a ball would travel
range = (-2. * velocity_initial**2 / gravity) * cos(alpha) * sin(alpha)
! Write the range for this angle
WRITE (*,*) 'Angle = ', angle, ' degree; Range = ',
range, &
' meters'
END DO loop
END program ballistic
fortran
I shoul display result by initial velocity 0 1 100 1000
but I am not sure how to display all of them
i can only do for one value
i think i should use loop..
Comment
Executable Code
program ball
! constant real values > gravitation, pi_val
! real values > angles, myalpha
implicit none
! Declaring the constant real values
REAL, PARAMETER :: gravitation = 9.81, pi_val=3.14159
! variable declarations
REAL :: velocities(5)
REAL :: myrange, myalpha
INTEGER :: angles, i
REAL :: maxdeg, maxrange
! variable Initialization
maxdeg = 5.
maxrange = 0
velocities = (/0, 1, 10, 100, 1000/)
! Displaying result
WRITE (*,*)
WRITE (*,*) "Displaying the range of the ball will travel"
WRITE (*,*)
! looping over all the given initial_velocities
loop1: do i=1,5
WRITE (*,*)
WRITE (*,*) "TABLE",i
WRITE (*,*)
! looping over all the given initial_angles
loop: do angles = 5, 85, 5
! Coverting angles in degree to the radian values
myalpha = angles * pi_val / 180.0
! Calculating the range of the ball
myrange = (-2. * velocities(i)**2 / gravitation) * cos(myalpha) * sin(myalpha)
! Writing the range for angles
WRITE (*,*) 'Angle = ', angles, ' degree; Range = ', myrange, &
' meters'
! check the angles range between 0 and 85
! if loop
IF ( angles < 0 .or. angles > 85 ) then
!Display a warning
WRITE (*,*) "Error, angle range invalid"
CYCLE
! end of If
END IF
! Comparing range to previous max range. If the range is large
! saving it and angle's occurance.
! if loop
IF ( myrange > maxrange ) THEN
maxrange = myrange
maxdeg = angles
! end of If
END IF
! end of Do
END DO loop
! Skiping a line
! printing out max range and angle of occurrance.
WRITE (*,*) ' '
WRITE (*,*) 'Maximum range = ', maxrange, ' at ', maxdeg, 'degrees'
END DO loop1
end program ball
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