cómo eliminar un registro de un archivo de texto en c ejemplo de código de programación

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Ejemplo: cómo eliminar datos y agregar desde un archivo en lenguaje c

#include#includevoidMenu();voidNew_Staff();voidDelete_Staff();voidExport_Profile();structelementchar id[20];char name[20];char gender[20];char phone[20];char email[20];profile;intmain(void)//The program will continue running until option 4 selected                                   int a;for(a=0;;a++)Menu();return0;voidMenu()//Main Menu to select optionint n;printf("n**********************************************");printf("nMAIN MENU-STAFF INFORMATION SYSTEM");printf("n**********************************************");printf("n1. Add profile Staff Profile");printf("n2. Delete Staff Profile");printf("n3. Export All Profiles to 'output.txt'");printf("n4. Exit");printf("n**********************************************");printf("nPlease enter your option< 1 / 2 / 3 / 4 >: ");scanf("%d",&n);switch(n)case1:New_Staff();break;case2:Delete_Staff();break;case3:Export_Profile();break;case4:printf("n*** Thanks for using the program! Goodbye. ***");exit(0);break;default:printf("nError! Wrong Number is EnterednPlease Try Again");break;voidNew_Staff()//Add New Staff Profile int x;structelement profile;printf("n===Add New Staff Profile===");printf("nnPlease enter the following staff information.");printf("nnStaff ID: ");scanf("%s",&profile.id);printf("Namet: ");fflush(stdin);fgets(profile.name,20,stdin);for(x=0; x<20; x++)if(profile.name[x]=='n')
        profile.name[x]='';printf("Gendert: ");scanf("%s",&profile.gender);printf("Phonet: ");scanf("%s",&profile.phone);printf("Emailt: ");scanf("%s",&profile.email);printf("nSYSTEM: New Staff Profile is Added Successfully.");voidDelete_Staff()//Delete Staff Profile                   
    FILE *fRead,*fWrite;char*TextFile;char c;int Delete_Id, temp =1;

    TextFile="output.txt";

    fRead =fopen(TextFile,"r");
    c =getc(fRead);while(c !=EOF)printf("%c", c);
    c =getc(fRead);rewind(fRead);printf("nDelete Staff with ID: ");scanf("%d",&Delete_Id);

    Delete_Id=Delete_Id+1;

    fWrite =fopen("copy.c","w");
    c =getc(fRead);while(c !=EOF)
    c =getc(fRead);if(c =='n')
    temp++;if(temp != Delete_Id)putc(c, fWrite);fclose(fRead);fclose(fWrite);remove(TextFile);rename("copy.c", TextFile);printf("nThe contents of file after being modified are as follows:n");

    fRead =fopen(TextFile,"r");
    c =getc(fRead);while(c !=EOF)printf("%c", c);
    c =getc(fRead);fclose(fRead);voidExport_Profile()//Export Staff Profile to Textstructelement profile;

    FILE *fPtr;
    fPtr=fopen("output.txt","w");
    FILE *fPtr1;
    fPtr1=fopen("output.txt","a+");if(fPtr ==NULL)printf("Error in opening filen");if(fPtr1 ==NULL)printf("Error in opening filen");fprintf(fPtr,"%10s %10s %10s %10s %10s","Staff","ID","Name","Gender","Phone","Email");fprintf(fPtr1,"n%10s %10s %10s %10s %10s", profile.id, profile.name,   
             profile.gender, profile.phone, profile.email);printf("n%10s %10s %10s %10s %10s","Staff","ID","Name","Gender","Phone","Email");printf("n%10s %10s %10s %10s %10s", profile.id, 
             profile.name, profile.gender, profile.phone, profile.email);printf("nSYSTEM: All staff profile have been exported to output.txt file");fclose(fPtr);fclose(fPtr1);

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