View Compilation Error

207443_0_27803.cpp:2: error: `_int64' does not name a type
207443_0_27803.cpp: In function `void f()':
207443_0_27803.cpp:6: error: `_int64' undeclared (first use this function)
207443_0_27803.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
207443_0_27803.cpp:6: error: expected `;' before "f1"
207443_0_27803.cpp:7: error: `f1' undeclared (first use this function)
207443_0_27803.cpp:7: error: `f2' undeclared (first use this function)
207443_0_27803.cpp:9: error: `a' undeclared (first use this function)
207443_0_27803.cpp: In function `int main()':
207443_0_27803.cpp:21: error: `a' undeclared (first use this function)