View Compilation Error

269721_0_21201.cpp: In function `int main(int, char**)':
269721_0_21201.cpp:7: error: `_int64' undeclared (first use this function)
269721_0_21201.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
269721_0_21201.cpp:7: error: expected `;' before "a"
269721_0_21201.cpp:8: error: `a' undeclared (first use this function)