title: "UNDEFINED REFRENCE TO clrscr();"
body: <pre><code>#include&lt;stdio.h&gt;
  #include&lt;conio.h&gt;
  void main()
  {
  int i=1,a,b,c,choice;
  do
  {
      printf("enter any two numbers\n");
      scanf("%d%d",&amp;a,&amp;b);
      printf("pressing one add the two numbers\nenter one if you want to\n");
      scanf("%d",&amp;choice);
      switch(choice)
      {
          case 1:
              {
                  c=a+b;
                  printf("the sum of the entered numbers%.1f\n\n:",c);
                  break;
              }
          default:
              printf("you have entered an invalid");
              break;
      }
      clrscr();
  }
  while(i==1);
  getch();
  }
  </code></pre>
  
  <p>i do not know cause my classmate is using turbo c and it's fine,for me i am using dev c++ but looks like clrscr(); is not known to the compiler help please.</p>