View Compilation Error

0_0_10555737_9033.c: In function `main':
0_0_10555737_9033.c:4: error: `__int64_t' undeclared (first use in this function)
0_0_10555737_9033.c:4: error: (Each undeclared identifier is reported only once
0_0_10555737_9033.c:4: error: for each function it appears in.)
0_0_10555737_9033.c:4: error: syntax error before "n"
0_0_10555737_9033.c:7: error: `n' undeclared (first use in this function)