View Compilation Error

233276_0_21634.cpp: In function `int main()':
233276_0_21634.cpp:9: error: `i' undeclared (first use this function)
233276_0_21634.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)
233276_0_21634.cpp:12: error: `s' undeclared (first use this function)