Thread: Having problem with C program plz help

You should replace the distances input function with a function to read from a text file containing a list of 10 short place names followed by the requisite number of distances


London Bath Cardiff Carlisle Durham Exeter Leeds Norwich Truro York
London - 23 12 89 456 123 46 732 345 123
Bath 23 - 46 234 123 46 89 234 567 90
Cardiff 12 46 - 767 456 46 234 123 732 35
Carlisle 89 234 767 - 732 32 48 67 98 100
Durham 456 123 456 732 - 234 46 89 89 732
Exeter 123 46 46 32 234 - 123 46 123 234
Leeds 46 89 234 48 46 123 - 46 89 19
Norwich 732 234 123 67 89 46 46 - 123 732
Truro 345 567 732 98 89 123 89 123 - 78
York 123 90 35 100 732 234 19 732 78 -

Fig 2 – Example Data (not accurate)


The details above are for example only and are not accurate distances. You should use different towns/cities and include valid values.



The menu should enable the grid to be displayed and also allow for journeys via intermediate stops to be input thus enabling a route to be calculated, for example, from London to Durham via Norwich and Leeds. In addition it is proposed that two rates of travel be catered for - journeys up to 100 miles will be at 40 pence per mile whilst any distance in excess of this will be at 30 ppm. Hence a journey of 100 miles should cost £40.00 whilst a journey of 200 miles will cost £70.00.
These amendments will require modifications to functions produced for part 1 but the basic structure of the program will remain the same.
Your program should implement the following functions:

1) Initialise: Read static data from a file and
a) store in appropriate data structures at run time
b) sort into alphabetic order for subsequent display in the grid.
2) Menu: A menu to support the following:
a) DispChart: Display the grid in a format similar to fig 2
b) CalcDistance: Allow input of a Journey between two points via up to 3 intermediate stops.
c) Totalcost: Allow input of two points and calculate the cost of the journey at 40ppm up to 100 miles (or km) and 30ppm for miles (or km) in excess of this.
d) Exit: to exit the program.
3) PlaceSearch: search for valid places during input of route details

Your code should be robust and include appropriate validation and error messages where appropriate.

I have done the coding but cant figurer out why it wont work can any one help plz thank you

Heres the code open attached

I'm pretty sure someone already posted about this exact assignment. Go run a search.

Failing that, at least give us some output or some errors.

Originally Posted by Game

You should replace the distances input function with a function to read from a text file containing a list of 10 short place names followed by the requisite number of distances


London Bath Cardiff Carlisle Durham Exeter Leeds Norwich Truro York
London - 23 12 89 456 123 46 732 345 123
Bath 23 - 46 234 123 46 89 234 567 90
Cardiff 12 46 - 767 456 46 234 123 732 35
Carlisle 89 234 767 - 732 32 48 67 98 100
Durham 456 123 456 732 - 234 46 89 89 732
Exeter 123 46 46 32 234 - 123 46 123 234
Leeds 46 89 234 48 46 123 - 46 89 19
Norwich 732 234 123 67 89 46 46 - 123 732
Truro 345 567 732 98 89 123 89 123 - 78
York 123 90 35 100 732 234 19 732 78 -

Fig 2 – Example Data (not accurate)


The details above are for example only and are not accurate distances. You should use different towns/cities and include valid values.



The menu should enable the grid to be displayed and also allow for journeys via intermediate stops to be input thus enabling a route to be calculated, for example, from London to Durham via Norwich and Leeds. In addition it is proposed that two rates of travel be catered for - journeys up to 100 miles will be at 40 pence per mile whilst any distance in excess of this will be at 30 ppm. Hence a journey of 100 miles should cost £40.00 whilst a journey of 200 miles will cost £70.00.
These amendments will require modifications to functions produced for part 1 but the basic structure of the program will remain the same.
Your program should implement the following functions:

1) Initialise: Read static data from a file and
a) store in appropriate data structures at run time
b) sort into alphabetic order for subsequent display in the grid.
2) Menu: A menu to support the following:
a) DispChart: Display the grid in a format similar to fig 2
b) CalcDistance: Allow input of a Journey between two points via up to 3 intermediate stops.
c) Totalcost: Allow input of two points and calculate the cost of the journey at 40ppm up to 100 miles (or km) and 30ppm for miles (or km) in excess of this.
d) Exit: to exit the program.
3) PlaceSearch: search for valid places during input of route details

Your code should be robust and include appropriate validation and error messages where appropriate.

I have done the coding but cant figurer out why it wont work can any one help plz thank you

Heres the code open attached

Here the error messages attached

Code:

#include <stdio.h>
#include <stdlib.h>
#include "string.h"

struct Chart
{
char Town[10][10];
int Distance[10][10];
};

Chart chart = 
{
{ "London", "Bath", "Cardiff", "Carlisle", "Durham", "Exeter", "Leeds", "Norwich", "Truro", "York" },
{
{ 0, 23, 12, 89, 456, 123, 46, 732, 345, 123 },
{ 23, 0, 46, 234, 123, 46, 89, 234, 567, 90 },
{ 12, 46, 0, 767, 456, 46, 234, 123, 732, 35 },
{ 89, 234, 767, 0, 732, 32, 48, 67, 98, 100 },
{ 456, 123, 456, 732, 0, 234, 46, 89, 89, 732 },
{ 123, 46, 46, 32, 234, 0, 123, 46, 123, 234 },
{ 46, 89, 234, 48, 46, 123, 0, 46, 89, 19 },
{ 732, 234, 123, 67, 89, 46, 46, 0, 123, 732 },
{ 345, 567, 732, 98, 89, 123, 89, 123, 0, 78 },
{ 123, 90, 35, 100, 732, 234, 19, 732, 78, 0 }
}
};

int ReadChart(const char filename[], Chart* chart)
 {
  FILE *fp;

     fp = fopen(Towns.txt, "r");
     if (fp == NULL)

    return 0;
 else 
  {
    size_t res = fread(chart, sizeof(Chart), 1, fp);
    fclose(fp);
    return res;
  }
 }

int WriteChart(const char filename[], const Chart* chart)
 {
  FILE *fp;

  fp = fopen(Towns.txt, "w");
  if (fp == NULL)
  return 0;
 else 
 {
  size_t res = fwrite(chart, sizeof(Chart), 1, fp);
  fclose(fp);
  return res;
 }
}               

int main(void)
{
 int  valid_input;
 int row,col;
 char des1,des2,des3;
 int menu;             /* Holds all chices open to the user */
  float total = 0;           /* the result of the calculation */

 
  printf("\n\nWhat would you like to do?\n\n");    /* WRITE instructions */
  printf("\t1 = Display Mileage chart from text file\n");
  printf("\t2 = Input of a Journey between two points via up to 3 intermediate stops\n");
  printf("\t3 = Display total cost of journey at 40 ppm up to 100 miles and 30ppm for mileas in excess of this\n");
  printf("\t4 = Exit program\n");
  printf("\n\nPleas make your selection now:\n\t");
  scanf("%d",&menu);                   /* READ calculation type */
    
  valid_input = 0;
     while( valid_input == 0 )
        {
           prinf("\t Please enter first destination point\n");    
           scanf("%s",des1);
           prinf("\t Please enter second destination point\n");    
           scanf("%s",des2);
           prinf("\t Please enter thrid destination point\n");    
           scanf("%s",des3);
           
	            else  
	            {
	            printf("\tError: Invalid \n");    
	            }
	      }
   switch (menu != 4)
   {
    case 1:   
    FILE *infile;
    infile = fopen("Towns.txt", "r");       // using relative path name of file
	       if (infile == NULL)
            {
             printf("Unable to open file."); 
            }
               
              for(row=1; row<11;row++) // reads in the data into the array in 2 loops 
               {                    
                      for(col=1;col<11;col++)
                      {
                         fscanf(infile,"%d", chart[row-1][col-1]);
                        
                      } 
               }      
                      
               for(row=0; row<10;row++) 
               {                  
                       printf("\n\n");   
                      for(col=0;col<10;col++)
                      {
                         printf("%-2d ",chart[row][col]);
                      }
                     
               }
               	printf("\n\n continue?");
	             scanf("%d", &menu);
               
 
  break;


  case 2:
    prinf("\t Please enter first destination point\n");    
    scanf("%s",des1);
    prinf("\t Please enter second destination point\n");    
    scanf("%s",des2);
    prinf("\t Please enter thrid destination point\n");    
    scanf("%s",des3);
 
  break;

   case 3:
      if Distance => 100 
     {
      total= 0.40*100;
     } 
    
     if Distance < 100
     {
      total= 0.30*100;
     }
   break;

   case 4:
     printf("Thank you for using my program");
   break;

   default: 
      printf("Invalid option selected\n");  
}
 
 int search ( node *root, int key )
 {
  if ( root != NULL ) {
    if ( key == root->data )
      return 1;
    else if ( key < root->data )
      return search ( root->left, key );
    else /* key > root->data */
      return search ( root->right, key );
  }

  return 0;
 }   
}

Made some tweaks hope this is better thank you all for you advise

I have got this prgram to work in miracle C but how do i convert it to get it to work in unix

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "node.h"


struct Chart
{
char Town[10][10];
int Distance[10][10];
};

Chart chart=
{
 { "London", "Bath", "Cardiff", "Carlisle", "Durham", "Exeter", "Leeds", "Norwich", "Truro", "York" },
   { 0, 23, 12, 89, 456, 123, 46, 732, 345, 123 },
   { 23, 0, 46, 234, 123, 46, 89, 234, 567, 90 },
   { 12, 46, 0, 767, 456, 46, 234, 123, 732, 35 },
   { 89, 234, 767, 0, 732, 32, 48, 67, 98, 100 },
   { 456, 123, 456, 732, 0, 234, 46, 89, 89, 732 },
   { 123, 46, 46, 32, 234, 0, 123, 46, 123, 234 },
   { 46, 89, 234, 48, 46, 123, 0, 46, 89, 19 },
   { 732, 234, 123, 67, 89, 46, 46, 0, 123, 732 },
   { 345, 567, 732, 98, 89, 123, 89, 123, 0, 78 },
   { 123, 90, 35, 100, 732, 234, 19, 732, 78, 0 },
};

int ReadChart(const char Towns[],const Chart* chart )
 {
  FILE *fp;

     fp = fopen("Towns.txt", "r");
     if (fp == NULL)

    return 0;
 else
  {
    size_t res = fread(chart, sizeof(Chart), 1, fp);
    fclose(fp);

    return res;
  }
 }

int WriteChart(const char Towns[], const Chart* chart)
 {
  FILE *fp;

  fp = fopen("Towns.txt", "w");
  if (fp == NULL)
  return 0;
 else
 {
  size_t res = fwrite(chart, sizeof(Chart), 1, fp);
  fclose(fp);
  return res;
 }
}

int main(void)
{
 char Distance;
 int  valid_input;
 int row,col;
 char des1,des2,des3;
 int menu;             /* Holds all chices open to the user */
 double total = 0.00;           /* the result of the calculation */


  printf("\n\nWhat would you like to do?\n\n");    /* WRITE instructions */
  printf("\t1 = Display Mileage chart from text file\n");
  printf("\t2 = Input of a Journey between two points via up to 3 intermediate stops\n");
  printf("\t3 = Display total cost of journey at 40 ppm up to 100 miles and 30ppm for mileas in excess of this\n");
  printf("\t4 = Exit program\n");
  printf("\n\nPleas make your selection now:\n\t");
  scanf("&#37;d",&menu);                   /* READ calculation type */

  valid_input = 0;
     while( valid_input == 0 )
        {
           printf("\t Please enter first destination point\n");
           printf("%s",des1);
           printf("\t Please enter second destination point\n");
           printtf("%s",des2);
           printf("\t Please enter thrid destination point\n");
           printf("%s",des3);

	            else
	            {
	            printf("\tError: Invalid \n");
	            }
	      }
   switch (menu != 4)
   {
    case 1:
    FILE *infile;
    infile = fopen("Towns.txt", "r");       // using relative path name of file
	       if (infile == NULL)
            {
             printf("Unable to open file.");
            }

              for(row=1; row<11;row++) // reads in the data into the array in 2 loops
               {
                      for(col=1;col<11;col++)
                      {
                         fscanf(infile,"%d", chart[row-1][col-1]);

                      }
               }

               for(row=0; row<10;row++)

               {
                       printf("\n\n");
                      for(col=0;col<10;col++)
                      {
                         printf("%-2d ",chart[row][col]);
                      }

               }
               	printf("\n\n continue?");
	             scanf("%d", &menu);


  break;


  case 2:
    prinf("\t Please enter first destination point\n");
    printf("%s",des1);
    prinf("\t Please enter second destination point\n");
    printf("%s",des2);
    prinf("\t Please enter thrid destination point\n");
    printf("%s",des3);

  break;

   case 3:
      if (Distance => 100)
     {
      total= 0.40*100;
     }

     if (Distance < 100)
     {
      total= 0.30*100;
     }
   break;

   case 4:
     printf("Thank you for using my program");
   break;

   default:
      printf("Invalid option selected\n");
}

 int search (node *root, int key)
 {
  if ( root != NULL)
  {
    if ( key == root->data )
      return 1;
    else if ( key < root->data )
      return search ( root->left, key );
    else /* key > root->data */
      return search ( root->right, key );
  }

  return 0;
 }
}

Node.h file

Code:

/* utilize an ifndef/define mechanism, so nodes will be define exactly once */
#ifndef _NODE_H
#define _NODE_H

/* Maximum length of names */
#define strMax 20

/* Define the node structure itself */
struct node
{ char data [strMax];
  struct node * left;
  struct node * right;
};

#endif

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