C++
x
12
1
2
3
struct a {4
5
std::ostream& method(std::ostream& os) const6
{ 7
os << "Test!";8
return os; 9
}10
11
};12
$ g++ prog.cc -Wall -Wextra -std=c++17 -pedantic
Start
/usr/lib/x86_64-linux-gnu/crt1.o: In function `_start': (.text+0x20): undefined reference to `main' collect2: error: ld returned 1 exit status
1
Finish