运行 ID: 7534

Main.cc: In function ‘int main()’:
Main.cc:7:24: error: ‘pai’ was not declared in this scope
     int c=20000/(a*b*b*pai);
                        ^~~
Main.cc:7:24: note: suggested alternative: ‘main’
     int c=20000/(a*b*b*pai);
                        ^~~
                        main