View Compilation Error

275894_0_27109.cpp: In function `int main()':
275894_0_27109.cpp:4: error: `_int64' undeclared (first use this function)
275894_0_27109.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
275894_0_27109.cpp:4: error: expected `;' before "a"
275894_0_27109.cpp:8: error: `a' undeclared (first use this function)