View Compilation Error

0_0_1680277_7603.cpp: In function `int main()':
0_0_1680277_7603.cpp:24: error: 'struct node' has no member named 'a'
0_0_1680277_7603.cpp:26: error: 'struct node' has no member named 'b'
0_0_1680277_7603.cpp:26: error: 'struct node' has no member named 'a'
0_0_1680277_7603.cpp:29: error: 'struct node' has no member named 'b'