View Compilation Error

0_0_7810714_21903.cpp: In function `int main(int, char**)':
0_0_7810714_21903.cpp:8: error: expected unqualified-id before "int"
0_0_7810714_21903.cpp:8: error: expected `,' or `;' before "int"
0_0_7810714_21903.cpp:11: error: `n' undeclared (first use this function)
0_0_7810714_21903.cpp:11: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7810714_21903.cpp:16: error: `r' undeclared (first use this function)