View Compilation Error

175205_0_24499.cpp: In function `int main()':
175205_0_24499.cpp:6: error: `_int64' undeclared (first use this function)
175205_0_24499.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
175205_0_24499.cpp:6: error: expected `;' before "o"
175205_0_24499.cpp:12: error: `o' undeclared (first use this function)