Question

How to initialize a vector using partial_sum in C++

Answer 1

#include <iostream>
#include <numeric>
#include <vector>
#include <iterator>
 
int main() {
    std::vector<int> vec(10, 3);
    std::partial_sum(vec.cbegin(), vec.cend(), vec.begin());
    
    std::copy(vec.cbegin(), vec.cend(), std::ostream_iterator<int>(std::cout, " "));

}
    
    
      
     
/*
run:
     
3 6 9 12 15 18 21 24 27 30 
     
*/

 

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