yankee.txt is shown below:

Yankee Doodle went to town riding on a pony Stuck a feather in his cap And called it macaroni.

Write a program in C to find an exact keyword (one that is expressed as a single word, starting and ending with a white-space character(either a space, tab, or newline)) in the given text file. Do not return words that are just containing the keyword as a substring. The output should print to screen: each line containing the keyword and its line number.

For example, if the keyword was "a" the output would be:

line 2: riding on a pony

line 3: Stuck a feather in his cap