Main.cc: In function 'int main()': Main.cc:8:22: error: 'print' was not declared in this scope print("%.2lf",a/b); ^ Main.cc:7:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf",&a,&b); ^