In this program, you will write your own versions of two string library functions.

Those functions are:

char$*$ mystrcat$($char$*$ dest, char$*$ src$)$: Concatenates string in character array src to string in array dest. Returns dest when complete.

Recall that string concatenation adds one string to the end of another, thus creating a longer string. So$,$ if char s$1[50]=$ "EECE" and char s$2[50]="\mathrm{.}2160"$ calling mystrcat$($s$1,$ s$2)$ would change the contents of s$1$ to "EECE$\mathrm{.}2160".$

char$*$ myfgets$($char$*$ str$,$ int n$,$ FILE$*$ fp$)$: Read line of input $($up to n $-1$ characters$)$ into str from input source fp$,$ which can refer to an input file or stdin. Returns str when done.

This function should read characters from its input source and store them in the array str until either $(1)$ a newline $($

$)$ is read and stored, or $(2)$ the maximum number of characters is reached.

So$,$ for example, given char s$[20]$ and user input "This is a string." with a newline after the period:

Calling myfgets$($s$,20,$ stdin$)$ would set s $=$ "This is a string.

$"($the newline character wouldn't appear in this way, but it would be in the array$)$

Calling myfgets$($s$,5,$ stdin$)$ would set s $=$ "This"

Make sure both functions ensure the resulting string is null$-$terminated when it's done!

In the file below, you should leave the main function unchanged. The function definitions you need to write are listed at the top of the file.