View Compilation Error

280998_0_27663.cpp: In function `int main()':
280998_0_27663.cpp:7: error: `_int64' undeclared (first use this function)
280998_0_27663.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
280998_0_27663.cpp:7: error: expected `;' before "sum1"
280998_0_27663.cpp:7: error: expected primary-expression before ',' token
280998_0_27663.cpp:7: error: `sum2' undeclared (first use this function)
280998_0_27663.cpp:7: error: expected primary-expression before '{' token
280998_0_27663.cpp:7: error: expected `;' before '{' token
280998_0_27663.cpp:16: error: `sum1' undeclared (first use this function)