View Compilation Error

178598_0_5364.cpp
178598_0_5364.cpp(6) : error C2065: 'cin' : undeclared identifier
178598_0_5364.cpp(10) : error C2065: 'sqrt' : undeclared identifier
178598_0_5364.cpp(14) : error C2065: 'cout' : undeclared identifier
178598_0_5364.cpp(14) : error C2297: '<<' : illegal, right operand has type 'char [4]'
178598_0_5364.cpp(15) : error C2297: '<<' : illegal, right operand has type 'char [7]'
178598_0_5364.cpp(18) : warning C4508: 'main' : function should return a value; 'void' return type assumed