October 1999
Beginner
304 pages
7h 11m
English
Content preview from Essential C++
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Exercise 2.2
The formula for the Pentagonal numeric sequence is Pn=n*(3n-1)/2. This yields the sequence 1, 5, 12, 22, 35, and so on. Define a function to fill a vector of elements passed in to the function calculated to some user-specified position. Be sure to verify that the position specified is valid. Write a second function that, given a vector, displays its elements. It should take a second parameter identifying the type of numeric series the vector represents. Write a main() function to exercise these functions.
#include <vector> #include <string> #include <iostream> using namespace std; bool calc_elements( vector<int> &vec, int pos ); void display_elems( vector<int> &vec, const string &title, ostream &os=cout ); int main() { vector<int> ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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