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I am working on a project called Payroll Management System... and am using C as the platform.

The project will look to ADD..VIEW..DELETE..& EDIT employee details. All this will be done by the Administrator.

I have been working on it a bit lately.. and i know before i seek help.. i need 2 post what ever i have done...

i am a little weak with the files concept... but whatever i have done i m posting here.. glad if i could get feedback and help.

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

struct user
{
int eno;
char name[50];
float basic,allow,deduct;
};

void addEmp(); //Adds new record to database
void disEmp(); //Displays all records from database
void delEmp(); //Requests Employee No and removes record from database
void modEmp(); //Requests Employee No and enables re-entry of data

void main()
{
int choice;
clrscr();
printf("\n==============WELCOME ADMIN !==============\n");
printf(" 1 -> Add Record\n");
printf(" 2 -> Display Record\n");
printf(" 3 -> Delete Record\n");
printf(" 4 -> Modify Record\n\n");
printf(" 0 -> Exit\n\n");
printf(" Selection : ");
scanf("%d",&choice);
switch(choice)
{
case 0:    break;
case 1:    addEmp();    break;
case 2:    disEmp();    break;
case 3:    delEmp();    break;
case 4:    modEmp();    break;
default:   clrscr();    main();
}
}
void addEmp()
{
user e;
int choice;
do
{
clrscr();
printf("\n==============ADD RECORD==============\n");
printf(" Employee Number :\t");
scanf("%d",&e.eno);
printf("\n Name :\t");
fflush(stdin);
gets(e.name);
printf("\n Basic Salary :\t");
scanf("%f",&e.basic);
printf("\n Allowances :\t");
scanf("%f",&e.allow);
printf("\n Deductions :\t");
scanf("%f",&e.deduct);
printf("\n\n 1 -> Save\n 2 -> Cancel\n Selection : ");
scanf("%d",&choice);
}
while(!(choice==1)||(choice==2));
if(choice==1)
	{
	printf("\nRecord Saved.");
	}
else
	{
	printf("\nRecord Cancelled.");
	}
printf("\nEnter Another Record?");
printf("\n 1 -> Yes\n 2->No\n Selection : ");
scanf("%d",&choice);
if(choice==1)
  addEmp();
else
  return;
main();
}



void disEmp()
{
user e;
clrscr();
{
printf("\n===============PAYSLIP - EMP.NO : %d===============\n",e.eno);
printf("\n Name :\t%s",e.name);
printf("\n Basic Salary :\t%f",e.basic);
printf("\n Allowances :\t%f",e.allow);
printf("\n Deductions :\t%f",e.deduct);
printf("\n Gross Salary :\t%f",e.basic+e.allow);
printf("\n Net Salary :\t%f",e.basic+e.allow-e.deduct);
printf("\n===================================================\n");
}
main();
}

void delEmp()
{
    fstream data,temp;
    user e;
    int eno;
    clrscr();
    printf("\n==============DELETE RECORD==============\n");
    printf("Enter Employee No. to delete record :");
    scanf("%d",&eno);
    rename("data.dat","temp.dat");
    data.open("data.dat",ios::app);
    temp.open("temp.dat",ios::in);

    temp.seekg(0,ios::beg);

    while(temp.read((char*)&e,sizeof(e))){
	if(!(e.eno==eno)){
	    cout<<"Record to delete "<<e.eno;
	    data.write((char*) &e,sizeof(e));
	}
    }
    data.close();
    temp.close();

    system("Del temp.dat");

    main();
}

void modEmp()
{
fstream data,temp;
    user e;
    int eno;
    clrscr();
    printf("\n==============MODIFY RECORD==============\n");
    printf("Enter Employee No. to modify record :");
    scanf("%d",&eno);
    rename("data.dat","temp.dat");
    data.open("data.dat",ios::app);
    temp.open("temp.dat",ios::in);

    temp.seekg(0,ios::beg);

    while(temp.read((char*)&e,sizeof(e))){
	if(!(e.eno==eno)){
	    cout<<"Record to delete "<<e.eno;
	    data.write((char*) &e,sizeof(e));
	}
    }
    data.close();
    temp.close();

    system("Del temp.dat");

    main();
}

Edited by Narue: Added code tags

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5 Years
Discussion Span
Last Post by Smeagel13
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That's hard to read outside tags!

Maybe some validation, gets() can be dangerous ...

About the main() at the end of every function ... return is what you're looking for.

Also, while prototyping is not invalid, I think it's best avoided, that way you can clearly see dependencies if you work all the code upwards with main() being at the bottom.

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