Use system("cls") including the stdlib.h in the begining of the programm...
See the example......
#include<stdio.h>
#include<conio.h>
#include<string.h>
#include<stdlib.h>
main()
{
char name[10]="Deepak";
char pass[20]="Sharma";
char uname[10],upass[20];
printf("=======================LOGIN PANEL===========================\n");
printf("Username : ");
scanf("%s",uname);
printf("Password : ");
scanf("%s",upass);
system("cls");
if(strcmp(name,uname)||strcmp(pass,upass))
{
printf("\tACCESS DENIED\n\n");
printf("Enter a valid username and password...");
}
else
{
printf("\tACCESS GRANTED\n\n");
printf("Welcome %s, Happy to see you again :)",name);
}
getch();
}