View Compilation Error

220156_0_12749.cpp: In function `int main()':
220156_0_12749.cpp:7: error: `i' undeclared (first use this function)
220156_0_12749.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
220156_0_12749.cpp:10: error: `b' undeclared (first use this function)