View Compilation Error

172961_0_13829.cpp: In function `int main()':
172961_0_13829.cpp:8: error: `_int64' undeclared (first use this function)
172961_0_13829.cpp:8: error: (Each undeclared identifier is reported only once for each function it appears in.)
172961_0_13829.cpp:8: error: expected `;' before "a"
172961_0_13829.cpp:9: error: `a' undeclared (first use this function)
172961_0_13829.cpp:9: error: `b' undeclared (first use this function)