ds1.c

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define N 50
#define M 30
double currentincome=0;
double currentexpense=0;

struct node
{
char date[M];
double amount;
char category[N];
struct node *next;
}*income=NULL,*expense=NULL;

struct record
{
double x,y;
}*point=NULL;


void create(char x[],double y,char z[],struct node **temp);
void display(int a3);
struct node *readnext(struct node *ptr,FILE *fpointer);
void writeincome(struct node *ptr);
void writeexpense(struct node *ptr);
void deleterecord(struct node *ptr);
struct node *readincome(struct node *ptr);
struct node *readexpense(struct node *ptr);
void write(struct record *point);
struct record *readrecord();


int main()
{
int option,value;

double b;
char c[N],a[M];
char s1[15],s2[15],s3[15];



if(fopen("Record.bin","rb")!=NULL)/*first time it will give null bcoz there is no file name record.bin,therefor it will not take income
                     and expense from file,assign value will be displayed i.e 0,0..after creating income and expense first time
                      user exits then record.bin
                     will be create and again  when user runs program then this if will execute and take income and expense from file*/ 
{
point=readrecord();
currentincome=point->x;
currentexpense=point->y;
}

if(fopen("myincome.bin","rb")!=NULL)/*it means file is already created and some data is already there,and we have to get that and create
                                         linked list,address of first node will be in income pointer. step bcoz if we dont do this than 
                                     after closing terminal if we create inome and saved it than previous data will be deletedand it 
                                   overrtites in file...after doing this income will point to first node and all data will be come in ram
                                    in form linked list*/
{
income=readincome(income);
}
if(fopen("myexpense.bin","rb")!=NULL)
{
expense=readexpense(expense);
}


do{

printf("                                           _______________________________________________\n  " );
printf("                                         |     YOUR INCOME   =      %.2lf INR      \n ",currentincome);      
printf("                                          |     YOUR EXPENSE  =      %.2lf INR     \n ",currentexpense);
printf("                                          |     YOUR BALANCE  =      %.2lf INR     \n ",currentincome-currentexpense);
printf("                                          |_______________________________________________\n");
printf("ENTER THE OPTION FROM THE BELOW \n\n");
printf("1.INSERT INCOME \n");
printf("2.INSERT EXPENSE \n");
printf("3.VIEW INCOME RECORD \n");
printf("4.VIEW EXPENSE RECORD \n");
printf("5.EXIT\n");
scanf("%d",&option);
printf("\n\n\n");

switch(option)
{
case 1:
printf("**************   ADD INCOME   *****************\n\n");
printf("Enter The Date(e.g day month year)\n");
scanf("%s %s %s",s1,s2,s3);//gets,fgets and other functions are not working thats why these stepes have done 
  strcpy(a,"");
  strcat(a,s1);
  strcat(a," ");
  strcat(a,s2);
  strcat(a," ");
  strcat(a,s3);
printf("Enter The Amount\n");
scanf("%lf",&b);
printf("Enter the Category\n");
scanf("%s",c);
  



currentincome=currentincome+b;
create(a,b,c,&income);
writeincome(income);

break;
case 2:
printf("**************    ADD EXPENSE   *****************\n\n");
printf("Enter The Date(e.g day month year)\n");

scanf("%s %s %s",s1,s2,s3);
  strcpy(a,"");
  strcat(a,s1);
  strcat(a," ");
  strcat(a,s2);
  strcat(a," ");
  strcat(a,s3);

printf("Enter The Amount\n");
scanf("%lf",&b);
printf("Enter The Category\n");
scanf("%s",c);


currentexpense=currentexpense+b;
create(a,b,c,&expense);
writeexpense(expense);

break;
case 3:
printf("*********   YOUR INCOME RECORD IS   *******\n\n");
display(3);
break;
case 4:
printf("*********   YOUR EXPENSE RECORD IS   *******\n\n");
display(4);
break;
case 5:
point=(struct record*)malloc(sizeof(struct record));
point->x=currentincome;
point->y=currentexpense;
write(point);
break;
default:
printf("WRONG OPTION SELECTED -Enter Valid Option");
break;
}
}while(option!=5);


return 0;
}







void create(char x[],double y,char z[],struct node **temp)        /* it isokay to write *temp if we pass only income rather than &income*/
{
struct node *newnode,*ptr;
newnode=(struct node*)malloc(sizeof(struct node));
if(*temp==NULL)
{
strcpy(newnode->date,x);
newnode->amount=y;
strcpy(newnode->category,z);
newnode->next=NULL;
*temp=newnode;
}
else
{
ptr=*temp;
while(ptr->next!=NULL)
{
ptr=ptr->next;
}
strcpy(newnode->date,x);
newnode->amount=y;
strcpy(newnode->category,z);
newnode->next=NULL;
ptr->next=newnode;
}
}

void deleterecord(struct node *ptr)
{
struct node *freeme =ptr;
struct node *holdme=NULL;
while(freeme!=NULL)
{
holdme=freeme->next;
free(freeme);
freeme=holdme;
}
}






struct node *readnext(struct node *ptr,FILE *fpointer)
{

if(ptr==NULL)
{
ptr=(struct node *)malloc(sizeof(struct node));
fread(ptr,sizeof(struct node),1,fpointer);
ptr->next=NULL;
}
else
{
struct node *ptr1=ptr;
struct node *ptr2=(struct node *)malloc(sizeof(struct node));
while(ptr1->next!=NULL)
{
ptr1=ptr1->next;
}
fread(ptr2,sizeof(struct node),1,fpointer);
ptr1->next=ptr2;
ptr2->next=NULL;
}
return ptr;
}





struct node *readincome(struct node *ptr)
{
FILE *fpointer;
fpointer=fopen("myincome.bin","rb");
if(fpointer!=NULL)
{
deleterecord(ptr);
ptr=NULL;
fseek(fpointer,0,SEEK_END);
long filesize=ftell(fpointer);
rewind(fpointer);
int entries=(int)(filesize/(sizeof(struct node)));
for(int i=0;i<entries;i++)
{
fseek(fpointer,(sizeof(struct node)*i),SEEK_SET);
ptr=readnext(ptr,fpointer);
}
}
else
{
printf("ERROR IN OPENINNG FILE\n");
}
return ptr;
}








void display(int a3)
{
   if(a3==3)//if case 3 is executed,we have to print income record
    {
                   
                 if(fopen("myincome.bin","rb")==NULL)/*if user try to view record when there is no any record,i.e when user runs program
                                                       first time and wants to view record i.e there is no any
                                                        file created yet as myincome.bin,then it will =NULL */

                         {
                             printf("NO RECORDS AVAILABLE\n\n");
         printf("________________________________________________________________________________________________________________\n\n");
            
                        }
                else
              { 
                   //income=readincome(income);
                     struct node *ptr2=income;
                    while(ptr2!=NULL)
                        {
                              printf("Date: %s\nAmount: %.2lf INR\nCategory: %s\n\n",ptr2->date,ptr2->
                             amount,ptr2->category);
                              ptr2=ptr2->next;
                        }
            printf("________________________________________________________________________________________________________________\n\n");

               }
} 
else if(a3==4)//if case 4 is executed then we have to print expenese record
   {
               
                 if(fopen("myexpense.bin","rb")==NULL)/*if user try to view record when there is no any record,i.e when user runs program
                                                       first time and wants to view record i.e there is no any
                                                        file created yet as myexpense.bin,then it will =NULL */
               
                          {
                             printf("NO RECORDS AVAILABLE\n\n");
         printf("________________________________________________________________________________________________________________\n\n");     
                           }
                else 
                      { 

                        //   expense=readexpense(expense);
                           struct node *ptr2=expense;
                                    while(ptr2!=NULL)
                                    {
                                         printf("Date: %s\nAmount: %.2lf INR\nCategory: %s\n\n",ptr2->date,ptr2->
                                        amount,ptr2->category);
                                        ptr2=ptr2->next;
                                     }
               printf("________________________________________________________________________________________________________________\n\n");


                       } 

  } 

}








void writeincome(struct node *ptr)
{
FILE *fpointer;
fpointer=fopen("myincome.bin","wb");    
if(fpointer!=NULL)
{
struct node *ptr1=ptr;
struct node *holdnext=NULL;
while(ptr1!=NULL)
{
holdnext=ptr1->next;
ptr1->next=NULL;
fseek(fpointer,0,SEEK_END);
fwrite(ptr1,sizeof(struct node),1,fpointer);/*everytime we write into file,it will overwrite the data......                                                      whole data will be deleted and new data willl be written intofile*/
ptr1->next=holdnext;
holdnext=NULL;
ptr1=ptr1->next;
}
fclose(fpointer);
fpointer=NULL;
printf("\nINCOME SAVED SUCCESSFULLY\n\n");
 printf("________________________________________________________________________________________________________________\n\n");

}
else{
printf("\nCANNOT SAVE INCOME..TRY AGAIN\n");
 printf("________________________________________________________________________________________________________________\n\n");

}
}





void writeexpense(struct node *ptr)
{
FILE *fpointer;
fpointer=fopen("myexpense.bin","wb");    
if(fpointer!=NULL)
{
struct node *ptr1=ptr;
struct node *holdnext=NULL;
while(ptr1!=NULL)
{
holdnext=ptr1->next;
ptr1->next=NULL;
fseek(fpointer,0,SEEK_END);
fwrite(ptr1,sizeof(struct node),1,fpointer);/*everytime we write into file,it will overwrite the data.....
                                                     whole data will be deleted and new data willl be written intofile*/
ptr1->next=holdnext;
holdnext=NULL;
ptr1=ptr1->next;
}
fclose(fpointer);
fpointer=NULL;
printf("\nEXPENSE SAVED SUCCESSFULLY\n\n");
 printf("________________________________________________________________________________________________________________\n\n");

}
else{
printf("\nCANNOT SAVE EXPENSE..TRY AGAIN\n\n");
 printf("________________________________________________________________________________________________________________\n\n");

}
}












struct node *readexpense(struct node *ptr)
{
FILE *fpointer;
fpointer=fopen("myexpense.bin","rb");
if(fpointer!=NULL)
{
deleterecord(ptr);
ptr=NULL;
fseek(fpointer,0,SEEK_END);
long filesize=ftell(fpointer);
rewind(fpointer);
int entries=(int)(filesize/(sizeof(struct node)));
for(int i=0;i<entries;i++)
{
fseek(fpointer,(sizeof(struct node)*i),SEEK_SET);
ptr=readnext(ptr,fpointer);
}
}
else
{
printf("cannonot open file\n");

}
return ptr;
}















void write(struct record *point)
{
FILE *fpointer;
fpointer=fopen("Record.bin","wb");    
if(fpointer!=NULL)
{

fseek(fpointer,0,SEEK_END);
fwrite(point,sizeof(struct record),1,fpointer);/*everytime we write into file,it will overwrite the data.....
                                                     whole data will be deleted and new data willl be written intofile*/
}
else{
printf("FILEOPEN ERROR\n");
}
fclose(fpointer);
fpointer=NULL;

}






struct record *readrecord()
{
FILE *fpointer;
fpointer=fopen("Record.bin","rb");
struct record *ptr=NULL;

if(fpointer!=NULL)
{

fseek(fpointer,0,SEEK_SET);

ptr=(struct record *)malloc(sizeof(struct record));
fread(ptr,sizeof(struct record),1,fpointer);


}
else
{
printf("CANNOT OPEN FILE\n");
}
return ptr;
}