increment map using ++ operator

Question

I have a map to count the occurrence of words in a file. I am reading words from the file, and each time I read a word I want to do this:

map[word]++; //(where m         


        

Answer 1

will my program crash because the int in my map is unitialized?

No; if the element with key word doesn't exist, the element will be created and value initialized. A value-initialized int has a value of 0.