View Compilation Error

536460_0_0_27435.cpp: In function `bool run()':
536460_0_0_27435.cpp:5: error: `cin' undeclared (first use this function)
536460_0_0_27435.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
536460_0_0_27435.cpp:9: error: `sqrt' undeclared (first use this function)
536460_0_0_27435.cpp:12: error: `cout' undeclared (first use this function)
536460_0_0_27435.cpp:12: error: `ios' has not been declared
536460_0_0_27435.cpp:12: error: `fixed' undeclared (first use this function)
536460_0_0_27435.cpp:12: error: `setiosflags' undeclared (first use this function)
536460_0_0_27435.cpp:12: error: `setprecision' undeclared (first use this function)
536460_0_0_27435.cpp:12: error: `endl' undeclared (first use this function)