In the following C program, identify what is wrong with code and correct it. This program reads addresses from an input.txt file and sorts the adresses by order of zip codes into an output.txt file. Please also see the following error codes, thank you main.c: #include "contacts.h" #include #include int main(int argc, char **argv) { size_t size; FILE *fp_in, *fp_out; errno_t err; if (argc != 3) { printf("Usage: %s infile outfile", argv[0]); return 0; } err = fopen_s(&fp_in, argv[1], "r"); if (err != 0) { perror("Failed opening file for reading"); } err = fopen_s(&fp_out, argv[2], "w+"); if (err != 0) { perror("Failed opening file for writing"); } contact **c = alloc_contacts(MAX_CONTACTS); size = get_contacts(c, fp_in); if (size == 0) perror("get_contacts failed"); sort_contacts(c, size); print_contacts(c, size, fp_out); free_alloc(c, size); if (fp_in) { err = fclose(fp_in); if (err != 0) { perror("File could not be closed"); } } if (fp_out) { err = fclose(fp_out); if (err != 0) { perror("File could not be closed"); } } return 1; } contacts.c: #include "contacts.h" #include #include /*Creates up to 50 structures*/ void create_data(user_data *users[]) { char new_user[100]; int i = 0; user_data *temp; /*Gets input until no info left*/ while (gets(new_user) != NULL && i < 50) { /*Dynamically Allocates new structure, then copies to array of pointers to structures*/ temp = (user_data*)malloc(sizeof(user_data)); /*Get info from file*/ strcpy(temp->name, new_user); gets(temp->address); gets(temp->city); gets(temp->zipcode); users[i++] = temp; }; users[i] = NULL; } /*Sorts data according the zipcode*/ void sort_data(user_data *users[]) { user_data *temp; /*Sorts smallest number to beginning*/ for (int i = 0; users[i] != NULL; i++) for (int j = i+1; users[j] != NULL; j++) if (strcmp(users[i]->zipcode, users[j]->zipcode) > 0) { temp = users[j]; users[j] = users[i]; users[i] = temp; } } /*Outputs data*/ void print_data(user_data *users[]) { for (int i = 0; users[i] != NULL; i++) printf("%s\n%s\n%s\n%s\n", users[i]->name, users[i]->address, users[i]->city, users[i]->zipcode); } /*Frees dynamically allocated memory*/ void free_mem(user_data *users[]) { for (int i = 0; users[i] != NULL; i++) free((void*)users[i]); } contacts.h: #define CONTACTS_H_INCLUDED typedef struct user_data{ char name[100]; char address[100]; char city[100]; char zipcode[100]; } user_data; void create_data(user_data *users[]); void sort_data(user_data *users[]); void print_data(user_data *users[]); void free_mem(user_data *users[]);

In the following C program, identify what is wrong with code and correct it. This program reads addresses from an input.txt file and sorts the adresses by order of zip codes into an output.txt file. Please also see the following error codes, thank you main.c: #include "contacts.h" #include #include int main(int argc, char **argv) { size_t size; FILE fp_in, fp_out; errno_t err; if (argc != 3) { printf("Usage: %s infile outfile", argv[0]); return 0; } err = fopen_s(&fp_in, argv[1], "r"); if (err != 0) { perror("Failed opening file for reading"); } err = fopen_s(&fp_out, argv[2], "w+"); if (err != 0) { perror("Failed opening file for writing"); } contact **c = alloc_contacts(MAX_CONTACTS); size = get_contacts(c, fp_in); if (size == 0) perror("get_contacts failed"); sort_contacts(c, size); print_contacts(c, size, fp_out); free_alloc(c, size); if (fp_in) { err = fclose(fp_in); if (err != 0) { perror("File could not be closed"); } } if (fp_out) { err = fclose(fp_out); if (err != 0) { perror("File could not be closed"); } } return 1; } contacts.c: #include "contacts.h" #include #include /Creates up to 50 structures/ void create_data(user_data users[]) { char new_user[100]; int i = 0; user_data temp; /Gets input until no info left/ while (gets(new_user) != NULL && i < 50) { /Dynamically Allocates new structure, then copies to array of pointers to structures/ temp = (user_data)malloc(sizeof(user_data)); /Get info from file/ strcpy(temp->name, new_user); gets(temp->address); gets(temp->city); gets(temp->zipcode); users[i++] = temp; }; users[i] = NULL; } /Sorts data according the zipcode/ void sort_data(user_data users[]) { user_data temp; /Sorts smallest number to beginning/ for (int i = 0; users[i] != NULL; i++) for (int j = i+1; users[j] != NULL; j++) if (strcmp(users[i]->zipcode, users[j]->zipcode) > 0) { temp = users[j]; users[j] = users[i]; users[i] = temp; } } /Outputs data/ void print_data(user_data users[]) { for (int i = 0; users[i] != NULL; i++) printf("%s\n%s\n%s\n%s\n", users[i]->name, users[i]->address, users[i]->city, users[i]->zipcode); } /Frees dynamically allocated memory/ void free_mem(user_data users[]) { for (int i = 0; users[i] != NULL; i++) free((void)users[i]); } contacts.h: #define CONTACTS_H_INCLUDED typedef struct user_data{ char name[100]; char address[100]; char city[100]; char zipcode[100]; } user_data; void create_data(user_data users[]); void sort_data(user_data users[]); void print_data(user_data users[]); void free_mem(user_data users[]);

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

In the following C program, identify what is wrong with code and correct it.

This program reads addresses from an input.txt file and sorts the adresses by order of zip codes into an output.txt file.

Please also see the following error codes, thank you

main.c:

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

int main(int argc, char **argv) {
size_t size;
FILE *fp_in, *fp_out;
errno_t err;

if (argc != 3) {
printf("Usage: %s infile outfile", argv[0]);
return 0;
}

err = fopen_s(&fp_in, argv[1], "r");
if (err != 0) {
perror("Failed opening file for reading");
}
err = fopen_s(&fp_out, argv[2], "w+");
if (err != 0) {
perror("Failed opening file for writing");
}

contact **c = alloc_contacts(MAX_CONTACTS);
size = get_contacts(c, fp_in);
if (size == 0)
perror("get_contacts failed");
sort_contacts(c, size);
print_contacts(c, size, fp_out);
free_alloc(c, size);

if (fp_in) {
err = fclose(fp_in);
if (err != 0) {
perror("File could not be closed");
}
}

if (fp_out) {
err = fclose(fp_out);
if (err != 0) {
perror("File could not be closed");
}
}

return 1;
}

contacts.c:

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

/*Creates up to 50 structures*/
void create_data(user_data *users[])
{
   char new_user[100];
   int i = 0;
   user_data *temp;

   /*Gets input until no info left*/
   while (gets(new_user) != NULL && i < 50)
   {
       /*Dynamically Allocates new structure, then copies to array of pointers to structures*/
       temp = (user_data*)malloc(sizeof(user_data));

       /*Get info from file*/
       strcpy(temp->name, new_user);
       gets(temp->address);
       gets(temp->city);
       gets(temp->zipcode);

       users[i++] = temp;
   };

   users[i] = NULL;
}

/*Sorts data according the zipcode*/
void sort_data(user_data *users[])
{
   user_data *temp;

   /*Sorts smallest number to beginning*/
   for (int i = 0; users[i] != NULL; i++)
       for (int j = i+1; users[j] != NULL; j++)
           if (strcmp(users[i]->zipcode, users[j]->zipcode) > 0)
           {
               temp = users[j];
               users[j] = users[i];
               users[i] = temp;
           }
}

/*Outputs data*/
void print_data(user_data *users[])
{
for (int i = 0; users[i] != NULL; i++)
printf("%s\n%s\n%s\n%s\n", users[i]->name, users[i]->address, users[i]->city, users[i]->zipcode);
}

/*Frees dynamically allocated memory*/
void free_mem(user_data *users[])
{
for (int i = 0; users[i] != NULL; i++)
free((void*)users[i]);
}

contacts.h:

#define CONTACTS_H_INCLUDED

typedef struct user_data{
   char name[100];
   char address[100];
   char city[100];
   char zipcode[100];
} user_data;

void create_data(user_data *users[]);
void sort_data(user_data *users[]);
void print_data(user_data *users[]);
void free_mem(user_data *users[]);

Project8 - Microsoft Visual Studio
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free_alloc(c, size);
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if (fp_in) {
err = fclose(fp_in);
if (err != 0) {
32
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A 0 of 9 Warnings
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A Source Files
abc E0020
identifier "contacts" is undefined
Project8
main.c
24
C contacts.c
E0020
identifier "c" is undefined
Project8
main.c
24
c main.c
abc E0020
identifier "MAX_CONTACTS" is undefined
Project8
main.c
24
X C2065
'contacts': undeclared identifier
Project8
main.c
24
* C2065
'c: undeclared identifier
Project8
main.c
24
* C2100
illegal indirection
Project8
main.c
24
X C2065
"MAX_CONTACTS': undeclared identifier
Project8
main.c
24
X C2106
'=': left operand must be l-value
'c': undeclared identifier
Project8
main.c
24
X C2065
Project8
main.c
25
8 C2065
'c: undeclared identifier
Project8
main.c
Solution Explorer Team Explorer
28
* C2065
'c': undeclared identifier
Project8
main.c
29
Properties
X C2065
8 C1075
'c: undeclared identifier
Project8
main.c
30
'{': no matching token found
Project8
main.c
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Col 1
Ch 1
INS
1 Add to Source Control
3:38 PM
0 Type here to search
^ [a ENG
25
12/12/2020
20
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