reflex.cpp:4:17: error: pch.h: No such file or directory reflex.cpp: In function 'int main()': reflex.cpp:10: error: 'cin' was not declared in this scope reflex.cpp:14: error: 'cout' was not declared in this scope reflex.cpp:14: error: 'sec' was not declared in this scope reflex.cpp:17: error: 'cout' was not declared in this scope reflex.cpp:17: error: 'sec' was not declared in this scope reflex.cpp:24: error: expected primary-expression before '}' token reflex.cpp:24: error: expected ';' before '}' token