Here is a little programming challenge to practice your C skills prior to the projects being released. This isn't a graded assignment, or really an assignment at all. It's only for your own personal practice.

In this directory, there are two Python scripts and a Bash script

• generate-input.py - Writes a text file of 10000 lines to stdout, where each line contains some random number of integers, separated by spaces
• validate.py - This script takes two parameters inputfile and outputfile. The input file is the data generated by generate-input.py. The output file is the file that you will generate. This script will go through the input, sum up each line, then compare the result with the corresponding line in outputfile
• test.sh - This program will generate the input, call your program with the name of the input and output programs, then run validate.py against your output.

Your task is to write a C program that reads in the file generated by generate-input.py. The name of the program should be sum-input, and it should take two command line arguments:

$ sum-input input.txt output.txt

Here is what the overall flow should look like, with a simplified version of the input:

$ ./generate-input.py > input.txt
$ cat input.txt
8 8 1 8
2 3 4 6 4
9 5 3 8
3 2 1 5
3 4 6
2 5 1 2
1 2 9 8 2
2 5 1
3 3 3 7 9
8 8 7
$ ./sum-input input.txt output.txt
$ cat output.txt
25
19
25
11
13
10
22
8
25
23
$ ./validate.py input.txt output.txt
All results matched!

If the expected output is not correct, you will see

$ ./validate.py input.txt output.txt
Line 0 result 17 does not match expected value 15
Line 4 result 2 does not match expected value 10
Line 7 result 3 does not match expected value 13

There is a skeleton sum-input.c for you to fill in as well as a Makefile you can use.