View Compilation Error

36458_0_19835.cpp:6: error: expected unqualified-id before '!' token
36458_0_19835.cpp:6: error: expected `,' or `;' before '!' token
36458_0_19835.cpp: In function `int main()':
36458_0_19835.cpp:9: error: `p' undeclared (first use this function)
36458_0_19835.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)
36458_0_19835.cpp:9: error: `q' undeclared (first use this function)
36458_0_19835.cpp:12: error: expected primary-expression before '=' token
36458_0_19835.cpp:13: error: expected primary-expression before '==' token
36458_0_19835.cpp:17: error: expected primary-expression before '==' token
36458_0_19835.cpp:21: error: `sum' undeclared (first use this function)
36458_0_19835.cpp:25: error: `ans' undeclared (first use this function)