运行 ID: 129451

Main.cc: In function ‘int main()’:
Main.cc:5:11: warning: right operand of comma operator has no effect [-Wunused-value]
  cin>>a,b,c,d;
           ^
Main.cc:5:13: warning: right operand of comma operator has no effect [-Wunused-value]
  cin>>a,b,c,d;
             ^
Main.cc:5:14: warning: right operand of comma operator has no effect [-Wunused-value]
  cin>>a,b,c,d;
              ^
Main.cc:6:4: error: ‘sgit’ was not declared in this scope
  m=sgit((a-b)*(a-b)+(c-d)*(c-d));
    ^~~~
Main.cc:6:4: note: suggested alternative: ‘sig_t’
  m=sgit((a-b)*(a-b)+(c-d)*(c-d));
    ^~~~
    sig_t