View Compilation Error

0_0_10287856_8056.cpp: In function `int main()':
0_0_10287856_8056.cpp:48: error: `tp1' undeclared (first use this function)
0_0_10287856_8056.cpp:48: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_10287856_8056.cpp:48: error: `tp2' undeclared (first use this function)