运行 ID: 129596

Main.cc:1:1: error: ‘include’ does not name a type; did you mean ‘__has_include’?
 include 
 ^~~~~~~
 __has_include
Main.cc: In function ‘int main()’:
Main.cc:4:23: error: ‘cin’ was not declared in this scope
     double a, b, c=0; cin>>a;
                       ^~~
Main.cc:4:23: note: suggested alternative: ‘main’
     double a, b, c=0; cin>>a;
                       ^~~
                       main
Main.cc:8:5: error: ‘printf’ was not declared in this scope
     printf("%.2f", c/a);
     ^~~~~~
Main.cc:8:5: note: suggested alternative: ‘int’
     printf("%.2f", c/a);
     ^~~~~~
     int