View Compilation Error

0_0_19565125_27369.cpp: In function 'int main()':
0_0_19565125_27369.cpp:5:5: error: 'bign' was not declared in this scope
     bign sum, num;
     ^
0_0_19565125_27369.cpp:6:14: error: 'N' was not declared in this scope
     char str[N];
              ^
0_0_19565125_27369.cpp:10:2: error: 'sum' was not declared in this scope
  sum = 0;
  ^
0_0_19565125_27369.cpp:12:16: error: 'str' was not declared in this scope
  while (cin >> str ) {
                ^
0_0_19565125_27369.cpp:13:25: error: 'strcmp' was not declared in this scope
      if (strcmp(str, "0") == 0)
                         ^
0_0_19565125_27369.cpp:15:6: error: 'num' was not declared in this scope
      num = str;
      ^