View Compilation Error

221562_0_7278.cpp: In function `int main()':
221562_0_7278.cpp:5: error: `_int64' undeclared (first use this function)
221562_0_7278.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
221562_0_7278.cpp:5: error: expected `;' before "a"
221562_0_7278.cpp:7: error: `a' undeclared (first use this function)