View Compilation Error

122873_0_11020.cpp: In function `int main()':
122873_0_11020.cpp:7: error: `_int64' undeclared (first use this function)
122873_0_11020.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
122873_0_11020.cpp:7: error: expected `;' before "total"
122873_0_11020.cpp:12: error: `total' undeclared (first use this function)