c 2b 2b endl

1// endl example
2#include <iostream>     // std::cout, std::end
3using namespace std;
4int main () {
5
6  int a=100;
7  double b=3.14;
8
9  cout << a;
10  cout << endl;              // manipulator inserted alone
11  cout << b << endl << a*b;  // manipulator in concatenated insertion
12  endl (cout);               // endl called as a regular function
13
14  return 0;
15}

1#include <iostream>
2#include <chrono>
3 
4template<typename Diff>
5void log_progress(Diff d)
6{
7    std::cout << std::chrono::duration_cast<std::chrono::milliseconds>(d).count()
8              << " ms passed" << std::endl;
9}
10 
11int main()
12{
13    std::cout.sync_with_stdio(false); // on some platforms, stdout flushes on \n
14    volatile int sink = 0;
15 
16    auto t1 = std::chrono::high_resolution_clock::now();
17    for (int j=0; j<5; ++j)
18    {
19        for (int n=0; n<10000; ++n)
20            for (int m=0; m<20000; ++m)
21                sink += m*n; // do some work
22        auto now = std::chrono::high_resolution_clock::now();
23        log_progress(now - t1);
24    }
25}

1cout << "Hello " << '\n'<<"world";
2cout << "Hello " << endl<<"world";
3//Hello  
4//world