View Compilation Error

0_0_7775568_32670.cpp: In function `int main()':
0_0_7775568_32670.cpp:3: error: `inti' undeclared (first use this function)
0_0_7775568_32670.cpp:3: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7775568_32670.cpp:3: error: `n' undeclared (first use this function)
0_0_7775568_32670.cpp:3: error: `sum' undeclared (first use this function)
0_0_7775568_32670.cpp:5: error: `i' undeclared (first use this function)