View Compilation Error

583199_0_0_15966.cpp: In function `int main()':
583199_0_0_15966.cpp:28: error: `Q' undeclared (first use this function)
583199_0_0_15966.cpp:28: error: (Each undeclared identifier is reported only once for each function it appears in.)
583199_0_0_15966.cpp:28: error: expected `;' before "while"