brief explain about structure pointers with With example program ~ Dailyones

brief explain about structure pointers with With example program

process the structure using a structure pointer

Program

struct student       \\ A

    char name[30];   \\ B

    float marks;     \\ C

};              \\ D

main ( )

    struct student *student1;      \\ E

    struct student student2; \\ F

    char s1[30];

    float f;

    student1 = &student2;    \\ G

    scanf ("%s", name);          \\ H

    scanf (" %f", & f);      \\ I

    *student1.name = s1;         \\ J student1-> name = f;

    *student2.marks = f;         \\ K student1-> marks = s1;

    printf (" Name is %s \n", *student1.name);    \\ L

    printf (" Marks are %f \n", *student2.marks); \\ M

Explanation

1. Statement E indicates that student1 is the pointer to the structure.

2. Statement F defines the structure variable student2 so that memory is allocated to the structure.

3. Statement G assigns the address of the structure student2 to the pointer variable structure student1.

4. In the absence of statement G, you cannot refer to the structure using a pointer. This is because when you define the pointer to the structure, the memory allocation is done only for pointers; the memory is not allocated for structure. That is the reason you have to declare a variable of the structure type so that memory is allocated to the structure and the address of the variable is given to the point.

5. Statement J modifies a member of the structure using the * notation. The alternative notation is