View Compilation Error

0_0_38320148_13304.cpp: In function 'int Solve(int)':
0_0_38320148_13304.cpp:25:9: error: 'tmp' was not declared in this scope
         tmp[++_size] = x % 10;
         ^
0_0_38320148_13304.cpp:32:29: error: 'tmp' was not declared in this scope
         for (int j = 0; j < tmp[i]; j++)
                             ^
0_0_38320148_13304.cpp:36:13: error: 'tmp' was not declared in this scope
         if (tmp[i] == 4 || (pre == 6 && tmp[i] == 2)) {
             ^
0_0_38320148_13304.cpp:40:15: error: 'tmp' was not declared in this scope
         pre = tmp[i];
               ^
0_0_38320148_13304.cpp: In function 'int main()':
0_0_38320148_13304.cpp:53:24: error: 'solve' was not declared in this scope
         cout << solve(m) - solve(n - 1) << endl;
                        ^