View Compilation Error

0_0_1530558_30775.c:1:19: iostream: No such file or directory
0_0_1530558_30775.c:2: error: syntax error before "namespace"
0_0_1530558_30775.c: In function `main':
0_0_1530558_30775.c:6: error: `_int64' undeclared (first use in this function)
0_0_1530558_30775.c:6: error: (Each undeclared identifier is reported only once
0_0_1530558_30775.c:6: error: for each function it appears in.)
0_0_1530558_30775.c:6: error: syntax error before "sum"
0_0_1530558_30775.c:7: error: 'for' loop initial declaration used outside C99 mode
0_0_1530558_30775.c:7: error: `sum' undeclared (first use in this function)
0_0_1530558_30775.c:10: error: syntax error before '/' token
0_0_1530558_30775.c:13: error: `cout' undeclared (first use in this function)
0_0_1530558_30775.c:13: error: `endl' undeclared (first use in this function)