View Compilation Error

0_0_6552783_5812.c:12: error: syntax error before "getsum"
0_0_6552783_5812.c: In function `getsum':
0_0_6552783_5812.c:14: error: `_int64' undeclared (first use in this function)
0_0_6552783_5812.c:14: error: (Each undeclared identifier is reported only once
0_0_6552783_5812.c:14: error: for each function it appears in.)
0_0_6552783_5812.c:14: error: syntax error before "sum"
0_0_6552783_5812.c:16: error: `sum' undeclared (first use in this function)
0_0_6552783_5812.c: In function `main':
0_0_6552783_5812.c:30: error: `_int64' undeclared (first use in this function)
0_0_6552783_5812.c:30: error: syntax error before "sum"
0_0_6552783_5812.c:33: error: `sum' undeclared (first use in this function)