View Compilation Error

0_0_27076763_27647.cpp:9:1: error: 'a' was not declared in this scope
 a
 ^
0_0_27076763_27647.cpp:10:1: error: expected '}' before 'a'
 a
 ^
0_0_27076763_27647.cpp:10:1: error: expected ',' or ';' before 'a'
0_0_27076763_27647.cpp:20:1: error: expected declaration before '}' token
 }
 ^