View Compilation Error

856520_0_0_8514.cpp:3:2: invalid preprocessing directive #definepi
856520_0_0_8514.cpp: In function `int main()':
856520_0_0_8514.cpp:6: error: expected unqualified-id before "int"
856520_0_0_8514.cpp:6: error: expected `,' or `;' before "int"
856520_0_0_8514.cpp:7: error: `x' undeclared (first use this function)
856520_0_0_8514.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
856520_0_0_8514.cpp:8: error: `n' undeclared (first use this function)
856520_0_0_8514.cpp:12: error: `pi' undeclared (first use this function)
856520_0_0_8514.cpp:14: error: expected `}' at end of input