View Compilation Error

0_0_1761388_18442.cpp: In function `int main()':
0_0_1761388_18442.cpp:47: error: `i' undeclared (first use this function)
0_0_1761388_18442.cpp:47: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1761388_18442.cpp:48: error: `j' undeclared (first use this function)