View Compilation Error

0_0_35975439_21391.cpp: In function 'int pd(int, int)':
0_0_35975439_21391.cpp:6:3: error: 'num' was not declared in this scope
   num+=a%b;
   ^
0_0_35975439_21391.cpp: In function 'int main()':
0_0_35975439_21391.cpp:14:17: error: 'sum' was not declared in this scope
      if(sum(i,10)==sum(i,16)&&sym(i,16)==sum(i,12)){
                 ^
0_0_35975439_21391.cpp:14:39: error: 'sym' was not declared in this scope
      if(sum(i,10)==sum(i,16)&&sym(i,16)==sum(i,12)){
                                       ^