View Compilation Error

0_0_36531049_1840.cpp: In function 'int main()':
0_0_36531049_1840.cpp:69:10: error: 'x' was not declared in this scope
     link(x,y);
          ^
0_0_36531049_1840.cpp:69:12: error: 'y' was not declared in this scope
     link(x,y);
            ^