View Compilation Error

0_0_8403667_23264.cpp: In function `int work()':
0_0_8403667_23264.cpp:27: error: `tm' undeclared (first use this function)
0_0_8403667_23264.cpp:27: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8403667_23264.cpp: In function `int work1()':
0_0_8403667_23264.cpp:79: error: `tm' undeclared (first use this function)