View Compilation Error

0_0_4659979_27037.cpp:12: error: `node' does not name a type
0_0_4659979_27037.cpp: In function `int main()':
0_0_4659979_27037.cpp:42: error: `node' undeclared (first use this function)
0_0_4659979_27037.cpp:42: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4659979_27037.cpp:42: error: expected `;' before "a"
0_0_4659979_27037.cpp:52: error: `t' undeclared (first use this function)