C Program for the Implementation of a Simple Text Editor with featuress like Insertion, Deletion | CS1207 - System Software Laboratory

AIM:
      To write a "C" program to implement "Text Editor" with features like insertion, deletion in CS1207 - System Software Lab.

ALGORITHM:

1.Display options new, open and exit and get choice.
2.If choice is 1 , call Create() function.
3.If choice is 2, call Display() function.
4.If choice is 3, call Append() function.
5.If choice is 4, call Delete() function.
6.If choice is 5, call Display() function.
7.Create()
    7.1 Get the file name and open it in write mode.

    7.2 Get the text from the user to write it.
8.Display()
    8.1 Get the file name from user.
    8.2 Check whether the file is present or not.
    8.2 If present then display the contents of the file.
9.Append()
    9.1 Get the file name from user.
    9.2 Check whether the file is present or not.
    9.3 If present then append the file by getting the text to add with the existing file.
10. Delete()
    10.1 Get the file name from user.
    10.2 Check whether the file is present or not.
    10.3 If present then delete the existing file.

SOURCE CODE:

#include<stdio.h>
#include<conio.h>
#include<process.h>
int i,j,ec,fg,ec2;
char fn[20],e,c;
FILE *fp1,*fp2,*fp;
void Create();
void Append();
void Delete();
void Display();
void main()
{
 do {
  clrscr();
  printf("\n\t\t***** TEXT EDITOR *****");
  printf("\n\n\tMENU:\n\t-----\n ");
  printf("\n\t1.CREATE\n\t2.DISPLAY\n\t3.APPEND\n\t4.DELETE\n\t5.EXIT\n");
  printf("\n\tEnter your choice: ");
  scanf("%d",&ec);
  switch(ec)
  {
   case 1:
     Create();
     break;
   case 2:
     Display();
     break;
   case 3:
     Append();
     break;
   case 4:
     Delete();
     break;
   case 5:
     exit(0);
  }
 }while(1);
}
void Create()
{
 fp1=fopen("temp.txt","w");
 printf("\n\tEnter the text and press '.' to save\n\n\t");
 while(1)
 {
  c=getchar();
  fputc(c,fp1);
  if(c == '.')
  {
   fclose(fp1);
   printf("\n\tEnter then new filename: ");
   scanf("%s",fn);
   fp1=fopen("temp.txt","r");
   fp2=fopen(fn,"w");
   while(!feof(fp1))
   {
    c=getc(fp1);
    putc(c,fp2);
   }
   fclose(fp2);
   break;
  }}
}
void Display()
{
  printf("\n\tEnter the file name: ");
  scanf("%s",fn);
  fp1=fopen(fn,"r");
  if(fp1==NULL)
  {
   printf("\n\tFile not found!");
   goto end1;
  }
  while(!feof(fp1))
  {
   c=getc(fp1);
   printf("%c",c);
  }
end1:
  fclose(fp1);
  printf("\n\n\tPress any key to continue...");
  getch();
}
void Delete()
{
  printf("\n\tEnter the file name: ");
  scanf("%s",fn);
  fp1=fopen(fn,"r");
  if(fp1==NULL)
  {
   printf("\n\tFile not found!");
   goto end2;
  }
  fclose(fp1);
  if(remove(fn)==0)
  {
   printf("\n\n\tFile has been deleted successfully!");
   goto end2;
  }
  else
   printf("\n\tError!\n");
end2: printf("\n\n\tPress any key to continue...");
  getch();
}
void Append()
{
  printf("\n\tEnter the file name: ");
  scanf("%s",fn);
  fp1=fopen(fn,"r");
  if(fp1==NULL)
  {
   printf("\n\tFile not found!");
   goto end3;
  }
  while(!feof(fp1))
  {
   c=getc(fp1);
   printf("%c",c);
  }
  fclose(fp1);
  printf("\n\tType the text and press 'Ctrl+S' to append.\n");
  fp1=fopen(fn,"a");
  while(1)
  {
   c=getch();
   if(c==19)
    goto end3;
   if(c==13)
   {
    c='\n';
    printf("\n\t");
    fputc(c,fp1);
   }
   else
   {
    printf("%c",c);
    fputc(c,fp1);
   }
  }
end3: fclose(fp1);
  getch();
}

OUTPUT:

FILE CREATION:

DISPLAY:

APPENDAGE:

DISPLAY (AFTER APPENDAGE):

FILE DELETION:

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