View Compilation Error

0_0_5522276_31958.c:2:19: iostream: No such file or directory
0_0_5522276_31958.c:4: error: syntax error before "namespace"
0_0_5522276_31958.c: In function `main':
0_0_5522276_31958.c:30: error: `cin' undeclared (first use in this function)
0_0_5522276_31958.c:30: error: (Each undeclared identifier is reported only once
0_0_5522276_31958.c:30: error: for each function it appears in.)