Can anybody help? I am trying to build a Bank Management System but I am suppose

ID: 3695869 • Letter: C

Question

Can anybody help? I am trying to build a Bank Management System but I am supposed to use the code below to create it. It is all in C . I must adapt the code below, it was initiallhy used for a phonebook directory!

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

#define bool int;
#define true 1
#define false 0

struct contactStruct {
   int ID;
   char fName[20];
   char lName[20];
   char pNumber[15];
   char email[50];
   char address[100];
};
typedef struct contactStruct contactStrt;
// Read a struct assuming fields are separated by space
void readStruct(contactStrt * cStruct, FILE* fHandle)
{
   fscanf(fHandle, "%d", (*cStruct).ID);
   fscanf(fHandle, "%s", (*cStruct).fName);
   fscanf(fHandle, "%s", (*cStruct).lName);
   fscanf(fHandle, "%s", (*cStruct).pNumber);
   fscanf(fHandle, "%s", (*cStruct).email);
   fscanf(fHandle, "%s", (*cStruct).address);
}
// write a struct to the file assuming fields are separated by space
void writeStruct(contactStrt* cStruct, FILE* fHandle)
{
   fprintf(fHandle, "%d,", (*cStruct).ID);
   fprintf(fHandle, "%s,", (*cStruct).fName);
   fprintf(fHandle, "%s,", (*cStruct).lName);
   fprintf(fHandle, "%s,", (*cStruct).pNumber);
   fprintf(fHandle, "%s,", (*cStruct).email);
   fprintf(fHandle, "%s", (*cStruct).address);
   fprintf(fHandle, "%s", " ");
}
// reads one line splits on commas and puts into a struct
bool readLine(contactStrt * cStruct, FILE* fHandle)
{
   char line[255];
   char delim[2] = ",";
   char *token;
   if (fgets(line, 254, fHandle) != NULL) // read one line up to 254 charactes and put it in line!
   {
       // Tokenize it
       token = strtok(line, delim);
       (*cStruct).ID = atoi(token);
       //strcpy((*cStruct).ID, token);
       token = strtok(NULL, delim);
       strcpy((*cStruct).fName, token);
       token = strtok(NULL, delim);
       strcpy((*cStruct).lName, token);
       token = strtok(NULL, delim);
       strcpy((*cStruct).pNumber, token);
       token = strtok(NULL, delim);
       strcpy((*cStruct).email, token);
       token = strtok(NULL, delim);
       strcpy((*cStruct).address, token);
       (*cStruct).address[strlen((*cStruct).address) - 1] = '';
       return true;
   }
   else
   {
       return false;
   }
}
// Writes one line in the file
void writeLine(contactStrt * cStruct, FILE* fHandle)
{
   char line[255] = "";
   char id[50];
   _itoa((*cStruct).ID, id, 10);
   strcat(line, id);
   strcat(line, ",");
   strcat(line, (*cStruct).fName);
   strcat(line, ",");
   strcat(line, (*cStruct).lName);
   strcat(line, ",");
   strcat(line, (*cStruct).pNumber);
   strcat(line, ",");
   strcat(line, (*cStruct).email);
   strcat(line, ",");
   strcat(line, (*cStruct).address);
   strcat(line, " ");
   fprintf(fHandle, "%s", line);
}
// reads the whole file and populates list of contacts in contactsList
// it also keeps track of number of contacts read from the file in
// numOfContacts
void readFile(contactStrt contactsList[50], int* numOfContacts, FILE* fHandle)
{
   *numOfContacts = 0;
   while (readLine(&contactsList[*numOfContacts], fHandle) == true)
   {
       *numOfContacts = *numOfContacts + 1;
   }
}

void writeFile(contactStrt contactsList[50], int numOfContacts, FILE* fHandle)
{
   int i;
   for (i = 0; i < numOfContacts; i = i + 1)
   {
       writeLine(&contactsList[i], fHandle);
   }
}

// Search contacts using first name
void searchFirstName(contactStrt contactsList[50], int numOfContacts,
   char fName[50], contactStrt resultList[50], int * numOfResult)
{
   int ind;
   *numOfResult = 0;
   for (ind = 0; ind < numOfContacts; ind = ind + 1)
   {
       if (strcmp(fName, contactsList[ind].fName) == 0)
       {
           resultList[*numOfResult].ID = contactsList[ind].ID;
           strcpy(resultList[*numOfResult].fName, contactsList[ind].fName);
           strcpy(resultList[*numOfResult].lName, contactsList[ind].lName);
           strcpy(resultList[*numOfResult].pNumber, contactsList[ind].pNumber);
           strcpy(resultList[*numOfResult].address, contactsList[ind].address);
           strcpy(resultList[*numOfResult].email, contactsList[ind].email);
           *numOfResult = *numOfResult + 1;
       }
   }
}

void printSearchResult(contactStrt resultList[50], int * numOfResult)
{
   int ind;
   for (ind = 0; ind < *numOfResult; ind = ind + 1)
   {
       printf(" %d %s %s %s %s %s ", resultList[ind].ID, resultList[ind].fName
           , resultList[ind].lName, resultList[ind].pNumber, resultList[ind].email
           , resultList[ind].address);
   }
}

int main()
{
   // Variables
   char inFileName[255] = "contacts.txt"; // file names in windows can't be longer than 255 characters!
   char outFileName[255] = "copy.txt";
   FILE* fHandle = NULL; // File handler
   contactStrt cStruct;
   contactStrt contactsList[50];
   int numOfContacts;
   printf("Openning the file in read mod... ");
   fHandle = fopen(inFileName, "r");
   if (fHandle == NULL)
   {
       printf("ERR! Unable to open input file. ");
       return false;
   }
   printf("Reading from the file... ");
   //readStruct(&cStruct, fHandle);
   //readLine(&cStruct, fHandle);
   readFile(contactsList, &numOfContacts, fHandle);
   printf("Closing and openning the file in write mod... ");
   fclose(fHandle);

   contactStrt resultList[50];
   int numOfResult;
   char fName[50];
   printf("Please enter a first name: ");
   scanf("%s", fName);
   searchFirstName(contactsList, numOfContacts, fName, resultList, &numOfResult);
   printSearchResult(resultList,&numOfResult);

   fHandle = fopen(outFileName, "w");
   if (fHandle == NULL)
   {
       printf("ERR! Unable to open input file. ");
       return false;
   }
   //writeStruct(&cStruct, fHandle);
   //writeLine(&cStruct, fHandle);
   writeFile(contactsList, numOfContacts, fHandle);
   printf("Closing the file. ");
   fclose(fHandle);
   return 0;

Explanation / Answer

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

#define bool int;
#define true 1
#define false 0

void writeFile(contactStrt contactsList[50], int numOfContacts, FILE* fHandle)
{
   int i;
   for (i = 0; i < numOfContacts; i = i + 1)
   {
       writeLine(&contactsList[i], fHandle);
   }
}

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