Computing the sum with template iterators : vector size « vector « C++ Tutorial

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C++ Tutorial » vector » vector size 
16.24.1.Computing the sum with template iterators
#include <iostream>
#include <vector> 
using std::cout;
using std::endl;
using std::vector;

template <typename Iter> 
double vectorSum(Iter begin, Iter end) {
  double sum = 0.0;

  whilebegin != end )
    sum += *begin++;
  return sum;        


int main() {
  vector<int> sunny;
  sunny.push_back(7);  
  sunny.push_back(12);  
  sunny.push_back(15);
  cout << sunny.size() << " months on record" << endl; 
  cout << "vectorSum number of sunny days: "
  cout << vectorSum(sunny.begin(), sunny.end()) << endl; 

  return 0;
}
3 months on record
vectorSum number of sunny days: 34
16.24.vector size
16.24.1.Computing the sum with template iterators
16.24.2.vector size before and after elements insertion
16.24.3.Demonstration of size() and capacity()
16.24.4.Put more values onto the end of the vector,it will grow as needed
16.24.5.Show statistics about vector: size, max_size and capacity
16.24.6.vector: max_size(), size(), capacity()
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