View Compilation Error

72286_0_6098.cpp:3: error: `main' must return `int'
72286_0_6098.cpp: In function `int main(...)':
72286_0_6098.cpp:3: error: `_int64' undeclared (first use this function)
72286_0_6098.cpp:3: error: (Each undeclared identifier is reported only once for each function it appears in.)
72286_0_6098.cpp:3: error: expected `;' before "a"
72286_0_6098.cpp:6: error: `a' undeclared (first use this function)