Ch7 structures

Outline: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Objectives ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

7.1 Introduction ,[object Object],[object Object],[object Object],[object Object]

7.2 Defining a Structure ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],struct tag { member1 ; member2 ; ... memberN ; };

7.2 Defining a Structure – cont’1 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

7.2 Defining a Structure – cont’2 ,[object Object],[object Object],[object Object],[object Object],struct custAccount { int accNo; char accType; char name[80]; float accBalance; }; struct custAccount oldcust, newcust;

7.2 Defining a Structure – cont’3 ,[object Object],struct custAccount { int accNo; char accType; char name[80]; float accBalance; } oldcust, newcust;

7.2 Defining a Structure – cont’4 ,[object Object],struct date { int month; int day; int year; }; struct custAccount { int accNo; char accType; char name[80]; float accBalance; struct date payment; } oldcust, newcust; ,[object Object],[object Object]

7.2 Defining a Structure – cont’5

7.3 Defining using typedef ,[object Object],[object Object],[object Object]

7.3 Defining using typedef - cont’1 ,[object Object],[object Object],[object Object]

7.3 Defining using typedef - cont’2 ,[object Object],typedef struct { member1; member2; ...; memberN; } new_type ,[object Object],[object Object]

7.3 Defining using typedef - cont’3 ,[object Object],typedef struct { int accNo; char accType; char name[80]; float accBalance; } record; record oldcust, newcust; ,[object Object],[object Object]

7.3 Defining using typedef - cont’3 ,[object Object],[object Object],[object Object],[object Object],typedef struct { int month; int day; int year; } date; typedef struct { int accNo; char accType; char name[80]; float accBalance; date payment; } record; record cust[100];

7.3 Defining using typedef - cont’4 ,[object Object],typedef struct { int month; int day; int year; } date; typedef struct { int accNo; char accType; char name[80]; float accBalance; date payment; } record[100]; record cust; typedef struct { int month; int day; int year; } date; struct { int accNo; char accType; char name[80]; float accBalance; date payment; } cust[100];

7.4 Structure Members ,[object Object],[object Object],variable.member variables’ name act as a separator members’ name

7.4 Structure Members - cont’1 ,[object Object],struct date { int month; int day; int year; }; struct custAccount{ int accNo; char accType; char name[80]; float accBalance; struct date payment; } cust; Example: To access the info. of cust. /* to access the customer’s */ /* account no. */ cust.accNo /* to access the customer’s */ /* name */ cust.name cust.name[2] &cust.name[2] /* to access the month of */ /* the payment of customer */ cust.payment.month

7.5 Initializing Structures ,[object Object],[object Object]

7.5 Initializing Structures – cont’1 ,[object Object],storage_class struct tag variable = {value1, value2, ..., valueN}; Refer to the value of corresponding structure members auto, extern, register, static

7.5 Initializing Structures – cont’1 struct date { int month; int day; int year; }; struct custAccount { int accNo; char accType; char name[80]; float accBalance; struct date payment; }; static struct custAccount cust= {2345,‘S’,“Khadijah Ismail”,2400.90,9,7,2006}; : Example 7.9

7.5 Initializing Structures – cont’2 Example 7.10:

7.6 Nested Stuctures ,[object Object],[object Object]

7.6 Nested Structures – cont’1 struct employees{ char empName[25]; char address[30] ; char city [10] ; char state[2] ; long int poscode ; double salary; }; struct customers{ char custName[25]; char address[30] ; char city [10] ; char state[2] ; long int poscode ; double balance; }; struct addressInfo{ char address[30]; char city [10]; char state[2]; long int poscode; }; struct employees{ char empName[25]; struct addressInfo eAddress; double salary; }e1; struct customers{ char custName[25]; struct addressInfo cAddress; double balance; }c1; Example 7.12: :Example 7.13

7.7 Arrays of Structures ,[object Object],struct date { int month; int day; int year; }; struct custAccount{ int accNo; char accType; char name[80]; float accBalance; struct date payment; } cust[200]; struct date { int month; int day; int year; }; struct custAccount{ int accNo; char accType; char name[80]; float accBalance; struct date payment; }; struct custAccount cust[200]; OR

7.7 Arrays of Structures – cont’2 Example 7.16

7.7 Arrays of Structures – cont’1 ,[object Object],struct student { char name[80]; float courseMark; float finalMark; int TotMark; }; static struct student MarkList[ ] = { “ Kadir”, 45.50, 30.00, 76, "Azizan", 43.50, 30.00, 73, "Xavier", 44.50, 30.00, 75, "Nantha", 46.50, 30.00, 77, "Junani", 42.50, 30.00, 73, "Martha", 42.00, 30.00, 72 } ;

7.8 Structures and Pointers ,[object Object],struct name *ptr ; ,[object Object],struct PersonalData *ptr ; (*ptr).YearOfBirth=20 ; struct PersonalData *ptr ; ptr -> YearOfBirth=20 ; OR

7.8 Structures and Pointers – cont’1 Example 7.16: Example 7.17:

7.9 Passing Structures to Func ,[object Object],[object Object],[object Object]

7.9 Passing Structures … – cont’1 ,[object Object],[object Object],[object Object],[object Object]

7.9 Passing Structures … – cont’2 ,[object Object],[object Object]

7.9 Passing Structures … – cont’3 ,[object Object],[object Object]

Ch7 structures

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Ch7 structures