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Tips for Next Week's Lab


Structured data types

3 exercises
  • Define structured data types, initialise and print elements 

    boss.salary = 675000.00;
strcpy(boss.name, "John Elliot");
printf("Name: %s\n", boss.name);

  • Handle arrays of structured data 

    typedef struct {...} WorkerT;
WorkerT worker[1500];
for (i = 0; i < 1500; i++) {
	... worker[i].salary ...

  • Dynamically allocate memory using malloc() 

    *** test data file ***
20
Xiang 5
Bin 1
...


    #define NAMLEN 50
typedef struct { char name[NAMELEN]; int colour; } Preferences;

Preferences *firstMember;
scanf("%d", &number);
firstMember = (Preferences *)malloc(number * sizeof(Preferences));

    • Use of structptr->elem 

      ... firstMember->name ...