View Compilation Error

0_0_6712764_15625.c:1:20: iostream: No such file or directory
0_0_6712764_15625.c:2:19: cstring: No such file or directory
0_0_6712764_15625.c:3:17: cmath: No such file or directory
0_0_6712764_15625.c:4:18: cstdio: No such file or directory
0_0_6712764_15625.c:7: error: syntax error before "namespace"
0_0_6712764_15625.c: In function `pre':
0_0_6712764_15625.c:21: error: 'for' loop initial declaration used outside C99 mode
0_0_6712764_15625.c: In function `getans':
0_0_6712764_15625.c:37: error: 'for' loop initial declaration used outside C99 mode
0_0_6712764_15625.c: In function `main':
0_0_6712764_15625.c:49: error: syntax error before '/' token
0_0_6712764_15625.c:49: error: `i' undeclared (first use in this function)
0_0_6712764_15625.c:49: error: (Each undeclared identifier is reported only once
0_0_6712764_15625.c:49: error: for each function it appears in.)
0_0_6712764_15625.c:49: error: syntax error before ')' token