Hey, I want to make a program in which I will find the index of word and count how many words there in a txt file using c++.

You're in luck. https://rosettacode.org/wiki/Word_frequency has this implemented in not only C++ but over 60 other languages.

Given a text file and an integer n, print/display the n most common words in the file (and the number of their occurrences) in decreasing frequency.

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.