View Compilation Error

0_0_8057794_5610.c: In function `main':
0_0_8057794_5610.c:7: error: `_int64' undeclared (first use in this function)
0_0_8057794_5610.c:7: error: (Each undeclared identifier is reported only once
0_0_8057794_5610.c:7: error: for each function it appears in.)
0_0_8057794_5610.c:7: error: syntax error before "ret"
0_0_8057794_5610.c:12: error: `ret' undeclared (first use in this function)