View Compilation Error

142934_0_613.c: In function `main':
142934_0_613.c:4: error: `_int64' undeclared (first use in this function)
142934_0_613.c:4: error: (Each undeclared identifier is reported only once
142934_0_613.c:4: error: for each function it appears in.)
142934_0_613.c:4: error: syntax error before "a"
142934_0_613.c:6: error: `a' undeclared (first use in this function)