View Compilation Error

0_0_1406323_20385.cpp: In function `int main()':
0_0_1406323_20385.cpp:9: error: `_int64' undeclared (first use this function)
0_0_1406323_20385.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1406323_20385.cpp:9: error: expected `;' before "f0"
0_0_1406323_20385.cpp:13: error: expected `;' before "r"
0_0_1406323_20385.cpp:14: error: `f1' undeclared (first use this function)
0_0_1406323_20385.cpp:14: error: `f0' undeclared (first use this function)
0_0_1406323_20385.cpp:15: error: `r' undeclared (first use this function)