function to input and display student data

int getroll();
float getmark();

void display(char *,int,float);

void display(char *n,int ro,float m1)
{
printf("---------------------------------------------------\n");
printf("%20s%10s%15s\n","NAME","Roll NO","MARKS");
printf("---------------------------------------------------\n");
printf("%20s" ,n);
printf("%10d",ro);
printf("%15.2f",m1);

}
void main()
{
char *name="Hello",ch='u';
int roll;
float marks;
clrscr();
do
{
printf("Enter the name:");
scanf(" %s",name);
roll=getroll();

marks=getmark();
display(name,roll,marks);
printf("\nDo u want to continue? ");

printf("CH: %c",ch);
scanf(" %c",&ch);
printf("CH: %c",ch);

}while(ch!='n');
getch();

}

int  getroll()
{
int r;
printf("enter the roll number :");
scanf("%d",&r);
return r;

}

float getmark()
{

float m;
printf("enter the marks");
scanf("%f",&m);
return m;

}