View Compilation Error

0_0_33830128_15345.cpp:63:68: error: macro "M" requires 2 arguments, but only 1 given
   M(p,0);M(hd,0);M(v,0);M(fa,0);M(c,0);M(w,0);M(ans,0);M(fo,0);M(ch);
                                                                    ^
0_0_33830128_15345.cpp: In function 'int main()':
0_0_33830128_15345.cpp:63:64: error: 'M' was not declared in this scope
   M(p,0);M(hd,0);M(v,0);M(fa,0);M(c,0);M(w,0);M(ans,0);M(fo,0);M(ch);
                                                                ^