View Compilation Error

0_0_7562994_8690.cpp: In function `void init()':
0_0_7562994_8690.cpp:11: error: `i' undeclared (first use this function)
0_0_7562994_8690.cpp:11: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7562994_8690.cpp:13: error: `j' undeclared (first use this function)