View Compilation Error

0_0_6943934_19327.cpp: In function `int main()':
0_0_6943934_19327.cpp:103: error: `t2' undeclared (first use this function)
0_0_6943934_19327.cpp:103: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6943934_19327.cpp:109: error: expected `;' before "addedge"