View Compilation Error

0_0_11965616_29150.cpp: In function `int main()':
0_0_11965616_29150.cpp:37: error: `T' undeclared (first use this function)
0_0_11965616_29150.cpp:37: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11965616_29150.cpp:39: error: `n' undeclared (first use this function)