View Compilation Error

0_0_19567734_22428.cpp: In function 'int main()':
0_0_19567734_22428.cpp:53:7: error: expected primary-expression before 'double'
   com(double) c=com(double)(x,y)/com(double)(1-k*cos(A),-k*sin(A));
       ^
0_0_19567734_22428.cpp:53:13: error: 'com' was not declared in this scope
   com(double) c=com(double)(x,y)/com(double)(1-k*cos(A),-k*sin(A));
             ^
0_0_19567734_22428.cpp:54:28: error: 'c' was not declared in this scope
   printf("(%.3lf,%.3lf)\n",c.real(),c.imag());
                            ^