View Compilation Error

0_0_4542839_22113.c:1:20: iostream: No such file or directory
0_0_4542839_22113.c:2:18: cstdio: No such file or directory
0_0_4542839_22113.c:3: error: syntax error before "namespace"
0_0_4542839_22113.c:7: error: syntax error before "keep"
0_0_4542839_22113.c: In function `check':
0_0_4542839_22113.c:16: error: `NULL' undeclared (first use in this function)
0_0_4542839_22113.c:16: error: (Each undeclared identifier is reported only once
0_0_4542839_22113.c:16: error: for each function it appears in.)
0_0_4542839_22113.c: In function `main':
0_0_4542839_22113.c:25: error: `cin' undeclared (first use in this function)