运行 ID: 29176

Main.cc: In function ‘int main()’:
Main.cc:8:12: error: ‘doublea’ was not declared in this scope
  double c=(doublea/b;
            ^~~~~~~
Main.cc:8:12: note: suggested alternative: ‘double’
  double c=(doublea/b;
            ^~~~~~~
            double
Main.cc:8:21: error: expected ‘)’ before ‘;’ token
  double c=(doublea/b;
                     ^