in c using visual studio

Write a program that does the fallowing operations on strings. The program shows each operation as an option in the menu screen. 1) Print the length of string without using strlen function. In this option the user is allowed to enter a sentence. 2) Compares two strings and finds whether they are equal or not. In this option the user allowed to enter two strings 3) Appends one string at the end of another string. In this option the user allowed to enter two strings. 4) In this option the user will allow to enter 5 strings and save them in array of pointers to strings and print them. Each string can be max 50 characters. Note: you might have to locate memory on the heap using malloc function. 5) An exit option