View Compilation Error

0_0_8027595_20787.cpp: In function `int main()':
0_0_8027595_20787.cpp:33: error: `i' undeclared (first use this function)
0_0_8027595_20787.cpp:33: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8027595_20787.cpp:33: error: `result' undeclared (first use this function)