I need to write a program, using getline and copy (which we were given via the textbook) that takes in multiple lines of random letters, and outputs how many unique letters are in the line (upper and lowercase count the same). This was my attempt at that but it doesnt provide any output. What am I doing wrong?

(This is in C programming)

Hashtags serve to identify the topic of a given tweet true false

Which of these is an example of an integrated presentation? a. a table created in powerpoint b. an image pasted into powerpoint c. a caption created in powerpoint d. an excel chart pasted into powerpoint

Use a physical stopwatch to record the length of time it takes to run the program. calculate the difference obtained by calls to the method system.currenttimemillis() just before the start of the algorithm and just after the end of the algorithm. calculate the difference obtained by calls to the method system.currenttimemillis() at the start of the program and at the end of the program so that the elapsed time includes the display of the result. use the value returned by the method system.currenttimemillis() just after the end of the algorithm as the elapsed time.