Introduction - If you have any usage issues, please Google them yourself
1. Write a function that returns a pointer to the type of use, use the search function is a substring in the string, and returns the first match substring pointer. The prototype of this function is as follows: Input for 3 rows. The first acts of the two integer representing the length of the string and the need to find a substring. The second behavior string substring third acts. Output, see the main function. An input and output sample program is: Enter the length of string and substring 10 5 abcdefghij defgh find substring: defghij