all programs code write in c++ without any error

3. Counting Words Create a program that opens a file named words.txt and counts the whitespace-separated words in that file. -- words.txt This is a file that contains many words. Yes it does have so many words. Many, many words. Well, maybe it is not that many after all. So, just how many is MANY? 4. Word Occurrences Create a program that reads in a word from the user and counts the number of occurrences of that word in a file called words.txt. -- words.txt This is a file that contains many words. Yes it does have so many words. Many, many words. Well, maybe it is not that many after all. So, just how many is MANY? 5. Reversing a File The FillVector.cpp program prints its own lines with numbers at the beginning of each line. Modify this program in the following ways. First, make it read and print the lines of a file called "code.cpp". Second, print the same content with the line numbers reversed (i.e. starting with the highest number and counting down). -- Fillvector.cpp #include #include #include #include using namespace std; int main() { vector v; ifstream in("file.txt"); string line; while (getline(in, line)) //getline returns true if read successfully v.push_back(line); // Add the line to the end of v // Add line numbers: for (int i = 0; i #include } -- code.cpp #include #include using namespace std; int main(int args, char *argv[]) { double a, b, C; cin >> a; cin >> b; cin >> C; cout