3 THE FINDLAST FUNCTION Write the function findLast(). The function has two parameters: a const char * s1 pointing to the first character in a C-style string, and a const char * s2. Return a pointer to the last appearance of s2 appearing inside s1 and nullptr (0) if s2 does not appear inside s.

here is the support file, thank you

/**

CS 150 C-Strings

Follow the instructions on your handout to complete the

requested function. You may not use ANY library functions

or include any headers, except for for size_t.

*/

#include // size_t for sizes and indexes

///////////////// WRITE YOUR FUNCTION BELOW THIS LINE ///////////////////////

// function here

///////////////// WRITE YOUR FUNCTION ABOVE THIS LINE ///////////////////////

// These are OK after the function

#include

#include

using namespace std;

void CHECK(const char*, const char *, const string&);

void studentTests()

{

cout << "Student testing. Add code in this function." << endl;

cout << "-------------------------------------------------------------" << endl;

CHECK("Aardvark", "ar", "ark");

CHECK("Aardvark", "a", "ark");

CHECK("Aardvark", "r", "rk");

CHECK("Aardvark", "K", "nullptr");

cout << endl;

cout << "--done--" << endl;

}

int main()

{

studentTests();

}

#include

void CHECK(const char * s1, const char * s2, const string& expected)

{

string msg = "findLast(\"" + string(s1) + "\", \"" + string(s2) + "\")";

char d1[1024], d2[1024];

strcpy(d1, s1);

strcpy(d2, s2);

auto p = findLast(d1, d2);

string actual = (p ? string(p) : "nullptr");

if (expected == actual)

cout << " + " + msg + "->OK" << endl;

else

cout << " X " + msg + " expected<\"" + expected + "\">, found <\"" + actual + "\">" << endl;

}