Use C++

#include #include #include #include using namespace std; /I Copy n characters from the source to the destination. 3 void mystrncpy( ???) 25 26 27 28 29 11- 30 Find the first occurrance of char acter c within a string. 32 ??? mystrchr???) 34 35 36 37 38 39 / Find the last occurrance of character c within a string. 40 II 41 ??? mystrrchr ???) 42 43 45 int main() char userInput[ 81]; char *pChar = NULL; User input to be manipulated // Pointer to the result for some of the string functions cout > numberOfCharacters; mystrncpy (destination, userInput, numberofCharacters); cout > c pChar mystrchr( userInput, c) cout> c pChar mystrrchr (userInput, c); if(pChar== NULL) { cout