How to delete a contact from a phonebook program - c++

Question

I made a phonebook program which includes Add and search a contact.
But when I made the delete function, it deleted all the contacts instead of the one I entered.
I know it's a little bit complicated but any ideas?
This is the input in phonebook.txt from which I want to delete a contact:
Barney Hackett 0114543053
Luis Avery 01056633489
Hudson Ramsay 01576633982
Ihe code is:
void DeletePhoneNumber() {
FILE* search, * fp1;
//to receive the enter from system("cls")
char temp;
scanf("%c", &temp);
search = fopen("PHONEBOOK.txt", "r+");
fp1 = fopen("temp.txt", "w");
system("cls");
printf("\t*****DELETE CONTACT*****");
printf("\n\t Enter Name: ");
int length;
length = strlen(SearchName);
int i, y = 0;
//string comparison//
while (fgets(name, 50, search) != NULL) {
fputs(name, fp1);
}
fclose(search);
fclose(fp1);
search = fopen("PHONEBOOK.txt", "w");
fp1 = fopen("temp.txt", "r");
while (fgets(name, 50, search) != NULL) {
fputs(name, search);
}
fclose(search);
fclose(fp1);
remove("temp.txt");
printf("\n\tPRESS ANY KEY TO CONTINUE");
getch();
MainMenu();
}
}

Answer 1

I'll use this "answer" space to give you a partial analysis of your code. You can use it to improve your code.
Basically, your loop is all wrong:
search = fopen("PHONEBOOK.txt", "r+");
while (fgets(name, 50, search) != NULL) {
// ...
while (token != NULL) {
// ...
fclose(search);
search = fopen("PHONEBOOK.txt", "w");
You opened the file in append mode, read from it and now close the file, to open it in a different mode. What will it read on the next fgets in the while loop?
Opening the file in mode "w" for writing will destroy the file. So here is why there are no more entries in your file.
fclose(search);
MainMenu();
At the bottom of the loop you close the file. How can it still read something with fgets in the while loop.
Next you call MainMenu. But I assume this function calls this DeletePhoneNumber function, so you are in a strange loop/recursion. Of course, when you are done with deleting the phone number, you simply return to the main menu, not call it again.