View Compilation Error

0_0_10816407_14718.c: In function `main':
0_0_10816407_14718.c:5: error: `_int64' undeclared (first use in this function)
0_0_10816407_14718.c:5: error: (Each undeclared identifier is reported only once
0_0_10816407_14718.c:5: error: for each function it appears in.)
0_0_10816407_14718.c:5: error: syntax error before "n"
0_0_10816407_14718.c:6: error: `n' undeclared (first use in this function)