View Compilation Error

0_0_11720848_7625.cpp: In function `double get(ST)':
0_0_11720848_7625.cpp:34: error: `tm' undeclared (first use this function)
0_0_11720848_7625.cpp:34: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11720848_7625.cpp: In function `void initial()':
0_0_11720848_7625.cpp:72: error: `tm' undeclared (first use this function)
0_0_11720848_7625.cpp: In function `int main()':
0_0_11720848_7625.cpp:91: error: `tm' undeclared (first use this function)