foo.cpp: In function 'int main()':
foo.cpp:38:26: error: 'x' was not declared in this scope
   scanf("%s %d%d\n",&cm,&x,&y);
                          ^
foo.cpp:38:29: error: 'y' was not declared in this scope
   scanf("%s %d%d\n",&cm,&x,&y);
                             ^