View Compilation Error

0_0_2107073_2911.c: In function `main':
0_0_2107073_2911.c:8: error: `int64_t' undeclared (first use in this function)
0_0_2107073_2911.c:8: error: (Each undeclared identifier is reported only once
0_0_2107073_2911.c:8: error: for each function it appears in.)
0_0_2107073_2911.c:8: error: syntax error before "t"
0_0_2107073_2911.c:18: error: `t' undeclared (first use in this function)
0_0_2107073_2911.c:24: error: syntax error before "i"