View Compilation Error

539557_0_0_20073.cpp: In function `int main()':
539557_0_0_20073.cpp:4: error: `_int64' undeclared (first use this function)
539557_0_0_20073.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
539557_0_0_20073.cpp:4: error: expected `;' before "unm"
539557_0_0_20073.cpp:9: error: `unm' undeclared (first use this function)