I need a program in C language using queue with linked list that shows real life application for example queing for train ticket . I tried but i used array instead of linked list . can someone do it using linked list .

#include

#include

struct reserve

{

struct passenger

{

int seatno,age;

char na[15];

}p[10][5];

struct detail

{

int h,t,count,sr;

}d[10];

}r;

void c_reserve()

{

for(int v=0;v<10;v++)

{

r.d[v].count=0;

r.d[v].h=0;

r.d[v].sr=0;

r.d[v].t=-1;

}

}

int isqueueempty(int n3)

{

return(r.d[n3].count==0?1:0);

}

int isqueuefull(int n3)

{

return(r.d[n3].count==(3+r.d[n3].sr)?1:0);

}

void disp()

{

printf("1.SEDHU EXPRESS FROM:KL TO: IPOH ");

printf("2.BAGATH EXPRESS FROM:TAIPEI TO: KL ");

printf("3.HOWRAH EXPRESS FROM:BATU GAJAH TO: KL ");

printf("4.RAJDHANI EXPRESS FROM:KL TO: SUNGAI PETANI ");

printf("5.PANDIAN EXPRESS FROM:KL TO: BUTTERWORTH ");

printf("------Enter your choice----- ");

}

int enqueue(int t1)

{

int i,m1,s,g,u;

char ch,ch1;

if(t1==-1)

{

disp();

printf("Enter the row which is to be enqueued:");

scanf("%d",&i);

i=i-1;

m1=i;

t1++;

}

else

{

m1=t1;

i=5;

}

s=t1+i;

u=5+t1;

if(r.d[s].sr<2)

{

printf("Do you belong to special reservation category say y or n: ");

scanf("%c",&ch);

if(ch=='y')

r.d[s].sr++;

}

if(!isqueuefull(s)||!isqueuefull(m1))

{

if(isqueueempty((5+m1))||(isqueuefull(m1)&&!isqueueempty((5+m1))))

{

r.d[s].t=(r.d[s].t+1)%5;

r.d[s].count++;

printf("Enter the name of the passenger:");

scanf("%s",r.p[s][r.d[s].t].na);

printf("Enter the age of the passenger:");

scanf("%d",&r.p[s][r.d[s].t].age);

if(r.p[s][r.d[s].t].age>110)

{

printf("INVALID DATA Enter the age of the passenger:");

scanf("%d",&r.p[s][r.d[s].t].age);

}

printf("Enter the ticket number of the passenger:");

scanf("%d",&r.p[s][r.d[s].t].seatno);

}

else

{

r.d[t1].t=(r.d[t1].t+1)%5;

strcpy(r.p[t1][r.d[t1].t].na,r.p[u][r.d[u].h].na);

r.p[t1][r.d[t1].t].age=r.p[u][r.d[u].h].age;

r.p[t1][r.d[t1].t].seatno=r.p[u][r.d[u].h].seatno;

printf(" %s is removed from the waiting list",r.p[u][r.d[u].h].na);

r.d[u].h=(r.d[u].h+1)%5;

r.d[u].count--;

r.d[t1].count++;

}

}

else

{

printf("Queue is full. You cannot reserve......");

if(!isqueuefull(5+m1))

{

printf("Do you want to be in the waiting list:");

scanf("%c",&ch1);

if(ch1=='y')

g=enqueue(m1);

}

}

return r.d[s].t;

}

int dequeue()

{

int n2,g;

printf("Enter the queue which has to be dequeued:");

disp();

scanf("%d",&n2);

n2=n2-1;

if(!isqueueempty(n2))

{

printf("Service is given to %s first",r.p[n2][r.d[n2].h].na);

r.d[n2].h=(r.d[n2].h+1)%5;

r.d[n2].count=r.d[n2].count-1;

if(!isqueueempty(n2+5))

g=enqueue(n2);

}

else

printf("There are no passengers. You cannot provide service.");

return r.d[n2].h;

}

void display(int i1)

{

i1--;

int i=r.d[i1].h,j=1;

printf("=======================================================");

printf("NAME: AGE: SEATNO:");

while(j<=r.d[i1].count)

{

printf(" %s %d %d ",r.p[i1][i].na,r.p[i1][i].age,r.p[i1][i].seatno);

i=(i+1)%5;

j++;

}

printf("=======================================================");

}

int main()

{

int n,nn=1,m,t=0,k;

char ch;

c_reserve();

while(nn==1)

{

printf("Do you want to reserve or cancel Enter either 1 or 2:");

scanf("%d",&n);

switch(n)

{

case 1:

k=enqueue(-1);

break;

case 2:

k=dequeue();

break;

case 3:

printf("Do you want to display all say y or n (if waiting list press w): ");

scanf("%c",&ch);

if(ch=='y')

{

m=0;

while(m<5)

{

display(m);

m++;

}

}

else

{

disp();

printf("Enter the choice :");

scanf("%d",&m);

}

if(ch=='w')

display(5+m);

if(ch=='n')

display(m);

break;

}

printf(" do you want to continue press 1:");

scanf("%d",&nn);

}

return 0;

}