19. Write a program where you first enter a set of name-and-value pairs, such as Joe 17 and Barbara 22. For each pair, add the name to a vector called names and the number to a vector called scores (in corresponding positions, so that if names[7]=="Joe" then scores[7]==17). Terminate input with NoName 0. Check that each name is unique and terminate with an error message if a name is entered twice. Write out all the (name,score) pairs, one per line.

20. Modify the program from exercise 19 so that when you enter a name, the program will output the corresponding score or name not found.

21. Modify the program from exercise 19 so that when you enter an integer, the program will output all the names with that score or score not found.

#19: define a function getData(vector < string > names, vector < int > scores) #20: define a function getScore(vector < string > names, vector < int > scores) #21: define a function getNames(vector < string > names, vector < int > scores) Do not forget to declare vectors before function getData!