C :: Why Print Entry Function Is Not Printing First Element At Phonebook

I have 2 function (AddEntry & PrintEntry)

I don't understand why the "PrintEntry" function doesn't print the first element at "phonebook[x].Name".

Code:
int counter=0;
void AddEntry(phone phonebook[]) {
counter++;
printf("Enter first name:
");
scanf("%s",phonebook[counter-1].Name);
printf("Enter last name:

[Code]...

Code:

int main(void) {
phone phonebook[20];
int i;
for (i=0;i<4;i++) {
AddEntry(phonebook);
PrintEntry(phonebook);
}
return 0;
}