How do you write a c program for hospital database using priority queue?

Answer 1

#include<stdio.h>

#include<conio.h>

typedef struct prque

{

char p_name[20];

int prn;

struct prque *next;

}prque;

prque * insert(prque *);

prque * delet(prque *);

void display(prque *);

int main()

{

int i,ch,n,prn1;

char p_name1[20];

prque *front;

clrscr();

front=NULL;

do

{

printf("\n1)Patient Entry");

printf("\n2)Delete");

printf("\n3)display Patiant List.");

printf("\n4)Exit");

printf("\nEnter your choice:");

scanf("%d",&ch);

switch(ch)

{

case 1:

front=insert(front);

break;

case 2: printf("\nPatient Name Deleted:%s\n",front->p_name);

front=delet(front);

break;

case 3: display(front);

break;

case 4:exit(0);

}

}while(ch!=4);

getch();

return 0;

}

prque *insert(prque *front)

{

char p_name[20];

int prn;

prque *temp,*current,*prev;

temp=(prque*)malloc(sizeof(prque));

printf("\nEnter patient name:");

scanf("%s",temp->p_name);

printf("\nEnter Status:\n1)General Check up\t2)Non Serious\t3)Serious.\t");

scanf("%d",&prn);

temp->prn=prn;

temp->next=NULL;

if(front==NULL)

{

front=temp;

}

else

{

if(prn>front->prn)//Insert at front

{

temp->next=front;

front=temp;

}

else if(prn<=front->prn) //insert at middle

{

current=front;

while(current->prn>=prn && current!=NULL)

{

prev=current;

current=current->next;

}

temp->next=prev->next;

prev->next=temp;

}

}

return(front);

}

prque * delet(prque *front)

{

prque *temp;

if(front==NULL)

{

printf("\nQueue is Underflow.");

return(front);

}

else

{

temp=front;

front=front->next;

free(temp);

}

return(front);

}

void display(prque *front)

{

prque *p;

p=front;

printf("\n--------------------------------------------------");

printf("\n\tPatient Name\t\tPriority\n");

printf("--------------------------------------------------");

while(p!=NULL)

{

printf("\n\t%s",p->p_name);

if(p->prn==3)

printf("\t\t\tSerious");

else if(p->prn==2)

printf("\t\t\tNon serious");

else if(p->prn==1)

printf("\t\t\tGenaral Checkup");

p=p->next;

}

}

/*

Output:

1)Patient Entry

2)Delete

3)display Patiant List.

4)Exit

Enter your choice:1

Enter patient name:Afridi

Enter Status:

1)General Check up 2)Non Serious 3)Serious. 3

1)Patient Entry

2)Delete

3)display Patiant List.

4)Exit

Enter your choice:1

Enter patient name:Ponting

Enter Status:

1)General Check up 2)Non Serious 3)Serious. 2

1)Patient Entry

2)Delete

3)display Patiant List.

4)Exit

Enter your choice:1

Enter patient name:Sangakara

Enter Status:

1)General Check up 2)Non Serious 3)Serious. 3

1)Patient Entry

2)Delete

3)display Patiant List.

4)Exit

Enter your choice:

1

Enter patient name:Clerke

Enter Status:

1)General Check up 2)Non Serious 3)Serious. 1

1)Patient Entry

2)Delete

3)display Patiant List.

4)Exit

Enter your choice:2

Patient Name Deleted:Afridi

1)Patient Entry

2)Delete

3)display Patiant List.

4)Exit

Enter your choice:1

Enter patient name:Vittori

Enter Status:

1)General Check up 2)Non Serious 3)Serious. 2

1)Patient Entry

2)Delete

3)display Patiant List.

4)Exit

Enter your choice:1

Enter patient name:Dilshan

Enter Status:

1)General Check up 2)Non Serious 3)Serious. 3

1)Patient Entry

2)Delete

3)display Patiant List.

4)Exit

Enter your choice:1

Enter patient name:Malinga

Enter Status:

1)General Check up 2)Non Serious 3)Serious. 1

1)Patient Entry

2)Delete

3)display Patiant List.

4)Exit

Enter your choice:2

Patient Name Deleted:Sangakara

1)Patient Entry

2)Delete

3)display Patiant List.

4)Exit

Enter your choice:3

--------------------------------------------------

Patient Name Priority

--------------------------------------------------

Dilshan Serious

Ponting Non serious

Vittori Non serious

Clerke Genaral Checkup

Malinga Genaral Checkup

1)Patient Entry

2)Delete

3)display Patiant List.

4)Exit

Enter your choice:2

Patient Name Deleted:Dilshan

1)Patient Entry

2)Delete

3)display Patiant List.

4)Exit

Enter your choice:2

Patient Name Deleted:Ponting

1)Patient Entry

2)Delete

3)display Patiant List.

4)Exit

Enter your choice:2

Patient Name Deleted:Vittori

1)Patient Entry

2)Delete

3)display Patiant List.

4)Exit

Enter your choice:2

Patient Name Deleted:Clerke

1)Patient Entry

2)Delete

3)display Patiant List.

4)Exit

Enter your choice:2

Patient Name Deleted:Malinga

1)Patient Entry

2)Delete

3)display Patiant List.

4)Exit

Enter your choice:2

Patient Name Deleted:(null)

Queue is Underflow.

1)Patient Entry

2)Delete

3)display Patiant List.

4)Exit

Enter your choice:4

*/

Written by: Fabianski Benjamin