View Compilation Error

156510_0_22466.cpp: In function `int main()':
156510_0_22466.cpp:5: error: `_int64' undeclared (first use this function)
156510_0_22466.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
156510_0_22466.cpp:5: error: expected `;' before "a"
156510_0_22466.cpp:7: error: `a' undeclared (first use this function)