"""
Ex. 4.3 from "A primer on..."
Same as ex 4.1, but read the F degree number
from a file with a specific format. 
"""

with open('Fdeg0.txt','r') as infile:
    infile.readline()
    infile.readline()
    infile.readline()
    line = infile.readline()
    words = line.split()
    F = float(words[-1])

C = (F - 32) * 5.0 / 9
print(f'{F} grader F er {C:.2f} grader C')

"""
Terminal> python f2c_file_read.py 
67.2 grader F er 19.56 grader C


"""