// Filename: STL-list.cc#include <iostream>#include <list>                                   //list container#include <numeric>                                //for accumulateusing namespace std;void display(const list<double> &lst) {    list<double>::const_iterator p;    for (p = lst.begin(); p !=lst.end(); ++p)        cout << *p << '\t';    cout << endl;}int main() {    double w[4] = { 0.9, 0.8, 88, -99.99 };    list<double> z;                                 // list container instantiated to hold double    for( int i = 0; i < 4; ++i)        z.push_front(w[i]);    display(z);    z.sort();    display(z);    cout << "sum is "    << accumulate(z.begin(),z.end(),0.0) << endl;}/*outOOP> gpp STL-list.ccOOP> a.out-99.99  88      0.8     0.9-99.99  0.8     0.9     88sum is -10.29OOP>*/