运行 ID: 86972

Main.cc: In function ‘int main()’:
Main.cc:4:9: warning: unused variable ‘n’ [-Wunused-variable]
     int n;
         ^
Main.cc: At global scope:
Main.cc:8:5: error: expected unqualified-id before ‘return’
     return 0;
     ^~~~~~
Main.cc:9:1: error: expected declaration before ‘}’ token
 }
 ^