View Compilation Error

0_0_1659528_5016.cpp:2: error: `_int64' does not name a type
0_0_1659528_5016.cpp: In function `int main()':
0_0_1659528_5016.cpp:4: error: `_int64' undeclared (first use this function)
0_0_1659528_5016.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1659528_5016.cpp:4: error: expected `;' before "x"
0_0_1659528_5016.cpp:5: error: `x' undeclared (first use this function)
0_0_1659528_5016.cpp:6: error: expected `;' before "w"
0_0_1659528_5016.cpp:7: error: `w' undeclared (first use this function)
0_0_1659528_5016.cpp: At global scope:
0_0_1659528_5016.cpp:9: error: `_int64' does not name a type