View Compilation Error

0_0_13326516_22590.cpp: In member function 'point point::operator+(const point&) const':
0_0_13326516_22590.cpp:40:24: error: 't' was not declared in this scope
         return point(x+t.x,y+t.y);
                        ^
0_0_13326516_22590.cpp: In member function 'point point::operator/(const double&) const':
0_0_13326516_22590.cpp:44:24: error: 't' was not declared in this scope
         return point(x/t,y/t);
                        ^
0_0_13326516_22590.cpp: In member function 'double point::operator^(const point&) const':
0_0_13326516_22590.cpp:52:18: error: 't' was not declared in this scope
         return x*t.y-y*t.x;
                  ^