View Compilation Error

0_0_11906314_8787.cpp: In function `void calc(int, int)':
0_0_11906314_8787.cpp:98: error: `tm' undeclared (first use this function)
0_0_11906314_8787.cpp:98: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11906314_8787.cpp: In function `void init(int)':
0_0_11906314_8787.cpp:123: error: `tm' undeclared (first use this function)