View Compilation Error

0_0_1406322_12808.c: In function `main':
0_0_1406322_12808.c:9: error: `_int64' undeclared (first use in this function)
0_0_1406322_12808.c:9: error: (Each undeclared identifier is reported only once
0_0_1406322_12808.c:9: error: for each function it appears in.)
0_0_1406322_12808.c:9: error: syntax error before "f0"
0_0_1406322_12808.c:11: error: 'for' loop initial declaration used outside C99 mode
0_0_1406322_12808.c:13: error: syntax error before "r"
0_0_1406322_12808.c:14: error: `f1' undeclared (first use in this function)
0_0_1406322_12808.c:14: error: `f0' undeclared (first use in this function)
0_0_1406322_12808.c:15: error: `r' undeclared (first use in this function)