1 print('==> Bull Kelp and Purple Urchin Population Simulator <==\n') 2 print('- Model Parameters ---') 4 5 6 8 9 10 11 c =float 12 if c<0: 13 14 a float(input ("Kelp growth rate: \n")) if a<0: print("Error: cannot have a negative growth rate") exit() b =float(input("Kelp death rate: \n")) if b<0: 16 17 18 19 ko 29 30 31 print("Error: exit() 33 34 35 36 37 (input("Urchin birth rate: \n")) print("Error: cannot have a negative birth rate") exit() d =float (input ("Urchin death rate: \n")) if d<0: print("Error: cannot have a negative death rate") exit() ko = max(0, float(input())) 20 u0= max(0, float(input())) 21 k =k0 cannot have a negative death rate") 22 u =u0 23 print( \n--- Initial Population ---') 24 print (f"Kelp population (in thousands) at t = 0: ") 25 print (f"Urchin population (in thousands) at t = 0: \n") 26 27 print('--- Simulation ---') n = int(input("Timescale: \n")) if n < 0: print("Error: cannot have a negative timescale ") exit() for t in range (n+1): # 0, 1 print (f"Time t = {t}: {k:.3f}k kelp, {u:.3f}k urchins") k_next = max(0, k + a*k - b*k*u) u_next max(0, u + c*k*u - d*u) k k_next u = u next
1 print('==> Bull Kelp and Purple Urchin Population Simulator <==\n') 2 print('- Model Parameters ---') 4 5 6 8 9 10 11 c =float 12 if c<0: 13 14 a float(input ("Kelp growth rate: \n")) if a<0: print("Error: cannot have a negative growth rate") exit() b =float(input("Kelp death rate: \n")) if b<0: 16 17 18 19 ko 29 30 31 print("Error: exit() 33 34 35 36 37 (input("Urchin birth rate: \n")) print("Error: cannot have a negative birth rate") exit() d =float (input ("Urchin death rate: \n")) if d<0: print("Error: cannot have a negative death rate") exit() ko = max(0, float(input())) 20 u0= max(0, float(input())) 21 k =k0 cannot have a negative death rate") 22 u =u0 23 print( \n--- Initial Population ---') 24 print (f"Kelp population (in thousands) at t = 0: ") 25 print (f"Urchin population (in thousands) at t = 0: \n") 26 27 print('--- Simulation ---') n = int(input("Timescale: \n")) if n < 0: print("Error: cannot have a negative timescale ") exit() for t in range (n+1): # 0, 1 print (f"Time t = {t}: {k:.3f}k kelp, {u:.3f}k urchins") k_next = max(0, k + a*k - b*k*u) u_next max(0, u + c*k*u - d*u) k k_next u = u next
C++ Programming: From Problem Analysis to Program Design
8th Edition
ISBN:9781337102087
Author:D. S. Malik
Publisher:D. S. Malik
Chapter5: Control Structures Ii (repetition)
Section: Chapter Questions
Problem 20PE: When you borrow money to buy a house, a car, or for some other purpose, you repay the loan by making...
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