Given an equation x1 +x2 + +xn = k, where k is a constant,

and x1, x2, . . . , xn are nonnegative integers (which are considered as

variables in the equation), list all the solutions. Write a C++ pro

gram to solve this problem. The input is a pair of integers (n, k) with

k n 2. The output is a list of all the solutions.

Submission requirement:

(a) Your submission has to include at least the source files, out

put files or screenshots of six examples, external documentation

(readme.pdf), and internal documentation. External documentation is a file in which you provide to the user about how to use

your program and your general idea. Internal documentation is

for someone to read your code.

2(b) Run your program on the following six inputs: (n = 3, k = 10),

(n = 4, k = 10), (n = 4, k = 11), (n = 5, k = 11), (n = 4, k = 12),

(n = 5, k = 12).