View Compilation Error

0_0_5020423_8521.cpp: In function `int main()':
0_0_5020423_8521.cpp:4: error: `int64' undeclared (first use this function)
0_0_5020423_8521.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_5020423_8521.cpp:4: error: expected `;' before "da"
0_0_5020423_8521.cpp:5: error: `da' undeclared (first use this function)
0_0_5020423_8521.cpp:8: error: `i' undeclared (first use this function)
0_0_5020423_8521.cpp:10: error: `T' undeclared (first use this function)
0_0_5020423_8521.cpp:13: error: `n' undeclared (first use this function)