pro$1.$ When n varies from $3$ to $50,$ TDMA methods are used to determine the displacement of x$1$ in equilibrium to find n versus x$1$ and graph it$.$ Using process C$++$

pro$2.$ Use the LU decomposition for n $=20$ to find the displacement of x$1$ from equilibrium. Also, find the sum of all the components of the L$,$ U$,$ and c vectors that you calculated when you solved the problem.

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I got the c$++$ code for question $1.$ However, I ran the c$++$ code, but an error occurred. I wonder what the problem is$.($Please refer to the picture below$)$

Link to the answer I received :

https:$//$www$.$chegg.com$/$homework$-$help$/$questions$-$and$-$answers$/$pro$1-$n$-$varies$-3-50-$tdma$-$methods$-$used$-$determine$-$displacement$-$x$1-$equilibrium$-$find$-$n$-$versus$-$x$-$q$180693185$