View Compilation Error

0_0_39378941_22675.cpp:13:8: error: no matching function for call to 'scanline::scanline()'
   13 | }line[N];
      |        ^
0_0_39378941_22675.cpp:12:5: note: candidate: 'scanline::scanline(double, double, double, int)'
   12 |     scanline(double yy,double x2,double x1,int io):y(yy),right_x(x2),left_x(x1),inout(io){}
      |     ^~~~~~~~
0_0_39378941_22675.cpp:12:5: note:   candidate expects 4 arguments, 0 provided
0_0_39378941_22675.cpp:8:8: note: candidate: 'constexpr scanline::scanline(const scanline&)'
    8 | struct scanline{
      |        ^~~~~~~~
0_0_39378941_22675.cpp:8:8: note:   candidate expects 1 argument, 0 provided
0_0_39378941_22675.cpp:8:8: note: candidate: 'constexpr scanline::scanline(scanline&&)'
0_0_39378941_22675.cpp:8:8: note:   candidate expects 1 argument, 0 provided