Help on Program

Hello, I am new to this forum and I don't really know exactly how this works. I am wondering if anyone who is good with C Programming could help me, I am very basic at this and I am taking a class in college and totally lost :P. But here we go, and Thanks ahead for any type of help, I thoroughly appreciate it.

The Program: A basic phonebook written in C. The use has to add contact, delete, and show the contacts utilizing: structs and dynamic memory allocation.

I have written this code:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
//Defining my variables

int entry;
int contactsnum=0;
int i=0;

//Defining my struct

typedef struct phonebook
{
char firstName[20];
char lastName[20];
char number[20];
}con;

//Attempting to create a code for adding and removing items in con struct
con * AddItem (con * conlist);
con * RemoveItem (con * conlist);

//main function

main(){
phonebook entry[100];
phonebook* contacts;
con=(phonebook*)malloc(sizeof(con)*sizeof(con));
//problem with this line compiler won't compile
con p;
int choice=0;


//A do while loop allows for constent adding and remove

do{
con listmember, *conlist;
char firstName[20];
char lastName[20];
char number[11];

printf("Hello, Welcome to Command Prompt Phonebook.\n");
printf("Please Select an option:\n");
printf("(1) Add Contact\n");
printf("(2) Delete Contact\n");
printf("(3) Search Phonebook\n");
printf("(4) Exit Program\n");
printf("Enter Selection:");
scanf("%d",&choice);

//switch for choices

switch(choice){
case 1:
printf("\nYou chose Add Contact:\n");
printf("\nPlease Enter First Name:");
scanf("%s",&p.firstName);
conlist=AddItem (contact,p.firstName);
printf("\nPlease Enter Last Name:");
scanf("%s",&p.lastName);
conlist=AddItem (con,p.lastName);
printf("\nPlease Enter Phone Number:");
scanf("%s",&p.number);
conlist=AddItem (con, number);
printf("\nNumber Added to Phonebook");
break;
/* The code I wrote here doesn't work. I get "expected
primary-expresion before '=' token" I don't really understand
whats wrong with it */

case 2:
printf("You chose Delete Contact:");
printf("Please Enter First Name:");
scanf("%d",&p.firstName);
conlist=RemoveItem (con,p.firstName);
printf("Please Enter Second Name:");
scanf("%d",&p.lastName);
conlist=RemoveItem (con,p.lastName);
printf("Please Enter Number:");
scanf("%f",&p.number);
conlist=RemoveItem (con,p.number);
printf("Number has been deleted");
break;
// Same problem

case 3:
printf("\nCommand Prompt Phonebook Contents:");
printf("\nFirst Name:%d",&p.firstName);
printf("\nLast Name:%d",&p.lastName);
printf("\nPhone Number:%f",&p.number);
break;
// Haven't really worked at this yet

default:
printf("Please Enter Valid Number");

case 4:
break;
}
}while(choice!=4);
printf("\nThanks for using! Goodbye!\n");

system("pause");
}


I have many problems in my syntax I assume, but being very basic I have no idea what to do. I would really apprecaite help; but, I'm sure this board gets many questions like this so I don't expect alot of help. I do thoroughly apprecaite even slight help. I'm not asking for you to write it how it SHOULD be but point me in the direct I need to look.

Thanks Again,

Ryan

Welcome to the forum, Ryan!

Whenever you post code, highlight it the code, and then click on the # icon of the window where you enter text.

That makes your code *MUCH* easier to read.

Please edit your last post, and add the code tags (as they're called), around your program.

I'll look at it in a bit.

Thanks for the welcome, I assume I will be using this resource alot during my time at CECS school haha.Thanks for the responce and I apologize for not knowing but here is the code again:

Code:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
//Defining my variables

int entry;
int contactsnum=0;
int i=0;

//Defining my struct

typedef struct phonebook
{
char firstName[20];
char lastName[20];
char number[20];
}con;

//Attempting to create a code for adding and removing items in con struct
con * AddItem (con * conlist);
con * RemoveItem (con * conlist);

//main function

main(){
phonebook entry[100];
phonebook* contacts;
con=(phonebook*)malloc(sizeof(con)*sizeof(con));
//problem with this line compiler won't compile
con p;
int choice=0;


//A do while loop allows for constent adding and remove

do{ 
con listmember, *conlist;
char firstName[20];
char lastName[20];
char number[11];

printf("Hello, Welcome to Command Prompt Phonebook.\n");
printf("Please Select an option:\n");
printf("(1) Add Contact\n");
printf("(2) Delete Contact\n");
printf("(3) Search Phonebook\n");
printf("(4) Exit Program\n");
printf("Enter Selection:");
scanf("%d",&choice);

//switch for choices

switch(choice){
case 1:
printf("\nYou chose Add Contact:\n");
printf("\nPlease Enter First Name:");
scanf("%s",&p.firstName);
conlist=AddItem (contact,p.firstName);
printf("\nPlease Enter Last Name:");
scanf("%s",&p.lastName);
conlist=AddItem (con,p.lastName);
printf("\nPlease Enter Phone Number:");
scanf("%s",&p.number);
conlist=AddItem (con, number);
printf("\nNumber Added to Phonebook");
break;
/* The code I wrote here doesn't work. I get "expected
primary-expresion before '=' token" I don't really understand
whats wrong with it */

case 2:
printf("You chose Delete Contact:");
printf("Please Enter First Name:");
scanf("%d",&p.firstName);
conlist=RemoveItem (con,p.firstName);
printf("Please Enter Second Name:");
scanf("%d",&p.lastName);
conlist=RemoveItem (con,p.lastName);
printf("Please Enter Number:");
scanf("%f",&p.number);
conlist=RemoveItem (con,p.number);
printf("Number has been deleted");
break;
// Same problem

case 3:
printf("\nCommand Prompt Phonebook Contents:");
printf("\nFirst Name:%d",&p.firstName);
printf("\nLast Name:%d",&p.lastName);
printf("\nPhone Number:%f",&p.number);
break;
// Haven't really worked at this yet

default:
printf("Please Enter Valid Number");

case 4:
break;
}
}while(choice!=4);
printf("\nThanks for using! Goodbye!\n"); 

system("pause");
}

Thanks again for all the help!

There are so many problems dude in the code rectify one by one i can pinpoint one or two here by just one go through here

if u r compiling your code with gcc the put in the following lines struct like

Code:

struct phonebook entry[100];
struct phonebook* contacts;

Code:

con=(phonebook*)malloc(sizeof(con)*sizeof(con));

Don't know what you want to do with above piece of code. as you already said con is global structure object that will be available through the file why u wanna allocate some ........ peice of memory to don't understand that

here Additem

Code:

conlist=AddItem (con,p.lastName);

is taking two parameters while the signature obove is taking one parameter how the compiler can compile this god knows
[code]
//Attempting to create a code for adding and removing items in con struct
con * AddItem (con * conlist);
con * RemoveItem (con * conlist);

[/code


try to solve these kind of bugs if the problem will not solve please post again the code with modifications

c y

Haha! I know its completely filed with problems. This is my first time learning C Programing and I have absolutely no idea what I'm doing. I really appreciate the help, I will go back and try to get it working, or at least half way because todays the day to send her in.

Thanks again for all the help!

Ryan

P.S. I will be back numerous times I can already tell. I love this place