Mã chấm: 269514

Main.cc: In function ‘int main()’:
Main.cc:10:17: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘int’ [-Wformat=]
     scanf("%d",n);
                 ^
Main.cc:12:39: error: expected ‘)’ before ‘;’ token
      pi= 4*(pi+((pow(-1,i)/((2*i)+1)));
                                       ^
Main.cc:10:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",n);
     ~~~~~^~~~~~~~