运行 ID: 232

Main.cc: In function ‘int main()’:
Main.cc:18:17: error: expected ‘:’ before ‘printf’
         default printf("error");    
                 ^~~~~~
Main.cc:4:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&a);
     ~~~~~^~~~~~~~~