View Compilation Error

0_0_7276780_21924.cpp:2: error: `_int64' does not name a type
0_0_7276780_21924.cpp: In function `int main()':
0_0_7276780_21924.cpp:11: error: `_int64' undeclared (first use this function)
0_0_7276780_21924.cpp:11: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7276780_21924.cpp:11: error: expected `;' before "n"
0_0_7276780_21924.cpp:12: error: expected `;' before "z"
0_0_7276780_21924.cpp:13: error: `n' undeclared (first use this function)
0_0_7276780_21924.cpp:15: error: `z' undeclared (first use this function)
0_0_7276780_21924.cpp:15: error: `fun' undeclared (first use this function)