Many people who's just have a new step on VC++ (including me) will wonder why they can't use "clrscr()" function althought they had add conio.h to the project already. This trick can make a newbie a little bit headache. However, finally I had discovered that if you want to clear screen on VC++. You need to add "stdlib.h" and use this function 'system("cls")'
Hope that, this will useful see ya