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#include <iterator>
#include <numeric>
class Example
{
private:
  int id;
public:
  Example(int i): id(i){}
};
 
int main() {
    Example e[10];
    std::iota(std::begin(e), std::end(e), 0);
    return 0;
}  

prog.cpp: In function ‘int main()’:
prog.cpp:12:17: error: no matching function for call to ‘Example::Example()’
     Example e[10];
                 ^
prog.cpp:8:3: note: candidate: Example::Example(int)
   Example(int i): id(i){}
   ^~~~~~~
prog.cpp:8:3: note:   candidate expects 1 argument, 0 provided
prog.cpp:3:7: note: candidate: constexpr Example::Example(const Example&)
 class Example
       ^~~~~~~
prog.cpp:3:7: note:   candidate expects 1 argument, 0 provided
prog.cpp:3:7: note: candidate: constexpr Example::Example(Example&&)
prog.cpp:3:7: note:   candidate expects 1 argument, 0 provided

Standard output is empty