View Compilation Error

164666_0_25162.c: In function `main':
164666_0_25162.c:8: error: `_int64' undeclared (first use in this function)
164666_0_25162.c:8: error: (Each undeclared identifier is reported only once
164666_0_25162.c:8: error: for each function it appears in.)
164666_0_25162.c:8: error: syntax error before "max"
164666_0_25162.c:12: error: syntax error before "sum"
164666_0_25162.c:21: error: `max' undeclared (first use in this function)
164666_0_25162.c:28: error: `sum' undeclared (first use in this function)