View Compilation Error

0_0_1989404_6824.c:1:19: iostream: No such file or directory
0_0_1989404_6824.c:2:16: cmath: No such file or directory
0_0_1989404_6824.c:3: error: syntax error before "namespace"
0_0_1989404_6824.c:4: error: syntax error before '&' token
0_0_1989404_6824.c: In function `main':
0_0_1989404_6824.c:8: error: `cin' undeclared (first use in this function)
0_0_1989404_6824.c:8: error: (Each undeclared identifier is reported only once
0_0_1989404_6824.c:8: error: for each function it appears in.)
0_0_1989404_6824.c:20: error: `cout' undeclared (first use in this function)
0_0_1989404_6824.c:20: error: `endl' undeclared (first use in this function)
0_0_1989404_6824.c: At top level:
0_0_1989404_6824.c:26: error: syntax error before '&' token
0_0_1989404_6824.c: In function `prime':
0_0_1989404_6824.c:29: error: `sum' undeclared (first use in this function)