What is the output??

Question

What is the output of :
#include <iostream.h>
#include<dos.h>
#include<complex.h>
using namespace std;
int main() {
complex z(1,2);
float x=arg(z);
complex y=conj(z);
cout<<x<<" "<<" "<<y;
sleep(10);
}

Answer 1

1:21: warning: extra tokens at end of #include directive /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/crt1.o: In function `_start': (.text+0x20): undefined reference to `main' collect2: error: ld returned 1 exit status
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