adder

from sys import argv
from os.path import exists

script, arg1, arg2 = argv

def copy(a,b):
    open(b,'w').write(open(a).read())

def read(a):
    return int(open(a).readline())

def write(a,b):
    open(a,'w').write(b)

def add(a,b):
    return a+b

file1 = open(arg1)
file2 = open(arg2)
print 'This program\'ll take whatever number you write in a file,'
print 'and add it with a number in another file...atleast I hope.'

num1 = int(raw_input('Let\'s get a first number: '))
num2 = int(raw_input('and the second number: '))


print 'Ok, they were %s and %s' % (num1,num2)
print 'Alright, let\'s open up \'%s\', and write %s to it, then %s to \'%s\'' % (arg1,num1,num2,arg2)
print add(num1,num2)
#turn to string to write to file
f = str(num1)
s = str(num2)

write(arg1,f)
write(arg2,s)
#close files
file1.close()
file2.close()


print 'alright, they\'re written..and closed to make sure they\'re not still in buffer'
print 'so now we\'ll reopen them and print out the result of whatever was in the file'

print 'Does the file exist? %s' % exists(arg1)
print 'And the other one? %s' % exists(arg2)

result = raw_input('Where do you want the result saved to?: ')
file3 = open(result,'w')
print 'Ok, lets add\'em up'
#read files, turn to string then write to result
new_r = str(add(read(arg1),read(arg2)))
write(result,new_r)


print 'Alright, we\'ll copy the result to a new file then read it, to see if it all worked.'

#write to new file then read answer
new_f = raw_input('New file is called what? ')
file4 = open(new_f,'w')
copy(result,new_f)
print 'And the result is~~~~ %s ' % open(new_f).readline()

file1.close()
file2.close()
file3.close()
file4.close()