Write a program that asks the user for the name of a file and a string to search for. the program will search the file for all occurrences of the specified string and display all lines that contain the string. after all occurrences have been located, the program should report the number of times the string appeared in the file. you can use the sample. txt provided. try your program on other text files as well. use c++ strings and c++ string library functions for your implementation.