View Compilation Error

0_0_2734826_16641.cpp: In function `int main()':
0_0_2734826_16641.cpp:7: error: `cin' undeclared (first use this function)
0_0_2734826_16641.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2734826_16641.cpp:8: error: `cout' undeclared (first use this function)
0_0_2734826_16641.cpp:8: error: `ios' has not been declared
0_0_2734826_16641.cpp:8: error: `fixed' undeclared (first use this function)
0_0_2734826_16641.cpp:8: error: `setiosflags' undeclared (first use this function)
0_0_2734826_16641.cpp:8: error: `setprecision' undeclared (first use this function)
0_0_2734826_16641.cpp:8: error: `endl' undeclared (first use this function)