Question

Create another program that will prompt a user for input file. The user will choose from 4 choices:

1. Display all positive balance accounts.

2. Display all negative balance accounts.

3. Display all zero balance accounts.

4. End program.

C PROGRAMMING

my code so far

#include<stdlib.h>

#include<stdio.h>

int main(void)

{

int request;

int account;

FILE *rptr;

char name[20];

double balance;

FILE *wptr;

  

int accountNumber;

  

if((wptr = fopen("clients.dat","w")) == NULL)

{

puts("File could not be opened");

}

else

{

puts("Enter the account, name, and balance.");

puts("Enter EOF to end input");

printf("%s","? ");

scanf("%d%29s%lf", &account, name, &balance);

  

while(!feof(stdin))

{

fprintf(wptr,"%d %s %.2f\n", account, name, balance);

printf("%s","? ");

scanf("%d%29s%lf", &account, name, &balance);

  

}

rewind(wptr);

fclose(wptr);

  

}

  

if((rptr = fopen("clients.dat","r")) == NULL)

{

puts("File could not be opened");

}

else

{

  

  

/*

printf("%s%s%s","Account","Name","Balance");

fscanf(rptr, "%d%29s%lf", &account,name, &balance);

   */

  

while(!feof(rptr))

{

  

printf("%s", "enter request: \n"

   "1. List negative balances. \n"

   "2. List positive balances. \n"

   "3.List Zero balances. \n"

   "4- End program.\n");

scanf("%d", &request);

  

switch(request)

{

case 1:

break;

  

case 2:

break;

  

case 3:

break;

  

default: printf("program is now ending ");

break;

}

  

}

}

  

return EXIT_SUCCESS;

}

MY CODE SO FAR

Answer 1

Program:

Here the modified code:

//Header file inclusion

#include<stdlib.h>

#include<stdio.h>

// Main method

int main(void)

{

// variable declaration

    int request;

    int account;

     int count;

     int i,accno[100];

double bal[100];

    FILE *rptr;

    char name[20];

    double balance;

    FILE *wptr;

// For storing the user entered file name

     char filename[30];

    int accountNumber;

// Getting the file name from the user

     printf("\n Enter the file Name:");

     scanf("%s",filename);

//Opening the user given file

    if((wptr = fopen(filename,"w")) == NULL)

    {

     puts("File could not be opened");

    }

//if file is successfully opened

    else

    {

     puts("Enter the account, name, and balance.");

     puts("Enter EOF to end input");

    count= scanf("%d%29s%lf", &account, name, &balance);

     while(1)

     {      if(count<3)

               break;

          else

          {

               fprintf(wptr,"%d %s %.2f\n", account, name, balance);

               count=scanf("%d%29s%lf", &account, name, &balance);

          }

     }

rewind(wptr);

fclose(wptr);

}

//Opening the file in read mode

   if((rptr = fopen(filename,"r")) == NULL)

   {

        puts("File could not be opened");

   }

//if successfully opened the file read the

   else

   {

        i=0;

          while(!feof(rptr))

          {

          fscanf(rptr,"%d %s %.2f",&accno[i],name &bal[i]);

          i++;

          }

   }

fclose(rptr);

     printf("enter request: \n"

             "1. List negative balances. \n"

             "2. List positive balances. \n"

             "3.List Zero balances. \n"

             "4- End program.\n");

     scanf("%d", &request);

     switch(request)

         {

          case 1:

//Display the account number which has negative balance

               for(i=0;i<100;i++)

               {

                    if(bal[i]<0)

                    printf("\n%d",accno[i]);

               }

break;

//Display the account that has positive balance

          case 2:

                   for(i=0;i<100;i++)

                    {

                        if(bal[i]>0)

                        printf("\n %d",accno[i]);

                   }

                    break;

   // Display the zero account balance                

          case 3:

                   for(i=0;i<100;i++)

                    {

                        if(bal[i]==0)

                        printf("\n %d",accno[i]);

                   }

                    break;

          default:

printf("program is now ending ");

                    break;

           }

return EXIT_SUCCESS;

}

Output:

The sample output is