"""
Ex. 4.4 from "A primer on..."
Same as ex 4.3, but now read multiple 
temperature values, store in lists, a
then both F and C numbers to a new file. 
"""

F_list = []
C_list = []

with open('Fdeg.txt') as infile:
    for i in range(3):
        infile.readline()
    
    for line in infile:
        words = line.split()
        F = float(words[-1])
        F_list.append(F)
        C = (F - 32) * 5 / 9
        C_list.append(C)

with open('outfile.txt','w') as outfile:
    for C, F in zip(F_list, C_list):
        outfile.write(f'{F:6.2f} {C:6.2f} \n')