output for the following code and why is it not working properly...

Question

#include <stdio.h>

int

main ()

{

  printf ("Welcome to Waleed Express!!\n");

  printf ("Where would you like to travel??\n");

  printf ("a:Gujranwala\nb:Lahore\nc:Islamabad\nd:Karachi\ne:Pindi\n");

  char Gujranwala, Lahore, Islamabad, Karachi, Pindi;

  int a, b, c, d, e;

  int city;

  city = 0;

  switch (city)

    {

    case 0:

      scanf ("%d", &a);

      printf ("choose time...\na:0800 am\nb:04:00 pm\nc:09:00 pm\n");

      int f, g, h;

      int j;

      int Time;

      Time = 1;

      switch (Time)

{

case 1:

  getchar ();

  scanf ("%d", &f);

  j = 350;

  printf ("Your fare is %d\n", j);

  break;

      case 2:

  getchar ();

  scanf ("%d", &g);

  j = 400;

  printf ("Your fare is %d\n", j);

  break;

      case 3:

  getchar ();

  scanf ("%d", &h);

  j = 450;

  printf ("Your fare is %d\n", j);

  break;

      default:

  printf ("invalid option...\nchoose again");

}

break;

    case 2:

      scanf ("%d", &b);

      printf ("choose time...\na:0800 am\nb:04:00 pm\nc:09:00 pm\n");

      int k, l, m;

      int n;

      int yes;

      yes = 1;

      switch (yes)

{

case 1:

  getchar ();

  scanf ("%d", &k);

  n = 450;

  printf ("Your fare is %d\n", n);

  break;

case 2:

  getchar ();

  scanf ("%d", &l);

  n = 500;

  printf ("Your fare is %d\n", n);

  break;

case 3:

  getchar ();

  scanf ("%d", &m);

  n = 550;

  printf ("Your fare is %d\n", n);

  break;

default:

  printf ("invalid option...\nchoose again");

}

break;

    case 3:

      scanf ("%d", &c);

      printf ("choose time...\na:0800 am\nb:04:00 pm\nc:09:00 pm\n");

      int o, p, q;

      int r;

      int no;

      no = 1;

      switch (no)

{

case 1:

  getchar ();

  scanf ("%d", &o);

  r = 550;

  printf ("Your fare is %d\n", r);

  break;

case 2:

  getchar ();

  scanf ("%d", &p);

  r = 600;

  printf ("Your fare is %d\n", r);

  break;

case 3:

  getchar ();

  scanf ("%d", &q);

  r = 650;

  printf ("Your fare is %d\n", r);

  break;

default:

  printf ("invalid option...\nchoose again");

}

break;

    case 4:

      scanf ("%d", &d);

      printf ("choose time...\na:0800 am\nb:04:00 pm\nc:09:00 pm\n");

      int s, t, u;

      int v;

      int please;

      please = 1;

      switch (please)

{

case 1:

  getchar ();

  scanf ("%d", &s);

  v = 650;

  printf ("Your fare is %d\n", v);

  break;

case 2:

  getchar ();

  scanf ("%d", &t);

  v = 700;

  printf ("Your fare is %d\n", v);

  break;

case 3:

  getchar ();

  scanf ("%d", &u);

  v = 750;

  printf ("Your fare is %d\n", v);

  break;

default:

  printf ("invalid option...\n choose again");

}

break;

    case 5:

      scanf ("%d", &e);

      printf ("choose time...\na:0800 am\nb:04:00 pm\nc:09:00 pm\n");

      int w, x, y;

      int z;

      int nice;

      nice = 1;

      switch (nice)

{

case 1:

  getchar ();

  scanf ("%d", &w);

  z = 750;

  printf ("Your fare is %d\n", z);

  break;

case 2:

  getchar ();

  scanf ("%d", &x);

  z = 800;

  printf ("Your fare is %d\n", z);

  break;

case 3:

  getchar ();

  scanf ("%d", &y);

  z = 850;

  printf ("Your fare is %d\n", z);

  break;

default:

  printf ("invalid option...\n choose again");

}

      break;

      printf ("invalid option\n choose again");

    }

  printf

    ("thank you for choosing waleed express...\n come back again\n Have a safe ride ...!!");

  getchar ();

}

Answer 1

you should have to  use scanf library ( #include<conio.h>.)

Answer 2

You're trying to make a loop depending on the switch options which is not directly possible. There are few workarounds to that.

1. Make a variable responsible for exit from the loop.

#include <stdio.h>

int main()
{
    int breakloop = 1;
    int scanVal = 1;
    
    while(breakloop)
    {
        scanf("%d",&scanVal);
        switch(scanVal)
        {
            case 1:
                //your code for case 1
                breakloop = 0;
                break;
            
            
            case 2:
                //your code for case 2
                breakloop = 0;
                break;

            default:
                //your code for default
        }
    }

    return 0;
}

2. Same as 1st option but with boolean instead of int.

#include <stdio.h>
#include <stdbool.h> //!!!important to include!!!

int main()
{
    int breakloop = true;
    int scanVal = 1;
    
    while(breakloop)
    {
        scanf("%d",&scanVal);
        switch(scanVal)
        {
            case 1:
                //your code for case 1
                breakloop = false;
                break;
            
            
            case 2:
                //your code for case 2
                breakloop = false;
                break;

            default:
                //your code for default
        }
    }

    return 0;
}

3.  Use functions!

#include <stdio.h>

void switchFun()
{
    int scanVal = 1;
    
    while(1)
    {
        scanf("%d",&scanVal);
        switch(scanVal)
        {
            case 1:
                //your code for case 1
                return;
            
            
            case 2:
                //your code for case 2
                return;

            default:
                //your code for default
        }
    }
}

int main()
{
    switchFun();
    return 0;
}

4. Using goto. (Please don't do that unless you really really want to.)

#include <stdio.h>

int main()
{
    int scanVal = 1;
    
    while(1)
    {
        scanf("%d",&scanVal);
        switch(scanVal)
        {
            case 1:
                //your code for case 1
                goto EndWhile;
            
            
            case 2:
                //your code for case 2
                goto EndWhile;

            default:
                //your code for default
        }
    }
    
    EndWhile:
        
        //your code after exit from the switch

    return 0;
}

As already mentioned I advise you not to use goto at all. It's generally low level programming function and if overused can make your code confusing.