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| #include <stdio.h>
void INS(int *a, int n, int *beg, int *end, int ITEM)
{
if( *beg==-1 ) //FIRST ELEMENT
{
*beg=0;
*end=0;
a[*end]=ITEM;
}
else if( *beg==*end+1 || ( *beg==0 && *end==(n-1) ) ) //OVERFLOW
{
printf("\n OVERFLOW. DELETE SOME ELEMENTS: ");
}
else
{ //Normal Situations
*end=*end+1;
a[*end]=ITEM;
}
}
void DEL(int *a, int *beg, int *end)
{
if( *beg==-1 )
{
printf("\n UNDERFLOW, ADD SOME ELEMENTS: ");
}
else if( *beg==*end ) //LAST ELEMENT
{
*beg=-1;
*end=-1;
printf("\n Element Deleted. \n");
}
else
{
*beg=*beg+1;
printf("\n Element Deleted.\n");
}
}
void Display(int *a, int beg, int end)
{ printf("\n");
int i=0;
if (beg!=-1)
for(i=beg; i<=end; i++)
{
printf(" %d ",a[i]);
}
else
printf("\n NO ELEMENTS. \n");
printf("\n");
}
void main()
{
int a[5];
int n=5; //max size
int beg=-1;
int end=-1;
int ch=1,ITEM;
while(ch!=4)
{
printf("\n MENU: ");
printf("\n 1. INSERT. ");
printf("\n 2. DELETE. ");
printf("\n 3. DISPLAY. ");
printf("\n 4. EXIT. ");
printf("\n Your Choice: ");
scanf("%d",&ch);
switch(ch)
{
case 1: //INSERT
printf("\n ENTER ITEM: ");
scanf("%d",&ITEM);
INS(a,n,&beg, &end, ITEM);
break;
case 2: //DELETE
DEL(a,&beg, &end);
break;
case 3: //DISPLAY
Display(a,beg,end);
break;
case 4: printf("\n Exiting... ");
}
}
}
|
