C++ Primer ex 7.14

[arnuld]

this programme work fine. any suggestions from you:
/* C++ Primer - 4/e
*
* exercise 7.13
* STATEMENT:
* write a programme to calculate the sum of the elements of
vector<double>
*
*/

#include <iostream>
#include <vector>

double sum_vector( std::vector<double&dvec ) {
double sum = 0;
for( std::vector<double>::const_iterator iter=dvec.begin();
iter != dvec.end();
++iter )
{
sum += *iter;
}

return sum;
}
int main()
{
std::vector<doubledvec;

std::cout << "Enter some floating-point numbers: "; double d;

while( std::cin >d )
{
dvec.push_back(d);
}
std::cout << "sum of all numbers = "
<< sum_vector( dvec )
<< std::endl;

return 0;
}

--
http://arnuld.blogspot.com

[Frank Birbacher]

arnuld schrieb:

this programme work fine. any suggestions from you:

Yes, use a typedef. I guess the next program is to do it with a list ;)

#include <iostream>
#include <vector>

typedef double Number;
typedef std::vector<NumberSequence;

//take a reference to const
Number sumOfSequence(Sequence const& seq)
{
Number sum = 0;
for(Sequence::const_iterator ...
Frank