View Compilation Error

0_0_4756621_21840.c:3:17: string: No such file or directory
0_0_4756621_21840.c:4:19: iostream: No such file or directory
0_0_4756621_21840.c:5:14: map: No such file or directory
0_0_4756621_21840.c:7: error: syntax error before "namespace"
0_0_4756621_21840.c:11: error: syntax error before '<' token
0_0_4756621_21840.c: In function `main':
0_0_4756621_21840.c:21: error: `mon' undeclared (first use in this function)
0_0_4756621_21840.c:21: error: (Each undeclared identifier is reported only once
0_0_4756621_21840.c:21: error: for each function it appears in.)