View Compilation Error

0_0_18666200_11438.cpp: In function 'void add(char*, char*, char*)':
0_0_18666200_11438.cpp:52:3: error: 'e' was not declared in this scope
   e=d/10;
   ^
0_0_18666200_11438.cpp:59:15: error: 'e' was not declared in this scope
    d=b[i]-'0'+e;
               ^
0_0_18666200_11438.cpp:68:15: error: 'e' was not declared in this scope
    d=a[i]-'0'+e;
               ^
0_0_18666200_11438.cpp:73:5: error: 'e' was not declared in this scope
  if(e)
     ^