View Compilation Error

0_0_5551393_2044.c:1:19: iostream: No such file or directory
0_0_5551393_2044.c:4:14: set: No such file or directory
0_0_5551393_2044.c:5: error: syntax error before "namespace"
0_0_5551393_2044.c:34: error: syntax error before '<' token
0_0_5551393_2044.c: In function `main':
0_0_5551393_2044.c:43: error: `s' undeclared (first use in this function)
0_0_5551393_2044.c:43: error: (Each undeclared identifier is reported only once
0_0_5551393_2044.c:43: error: for each function it appears in.)