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Write a C Program to understand how pointer to structure variable is sent to function

robaa
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2022-11-24
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Write a C Program to show an example how pointer to structure is sent to function. Here’s a Simple Program to check how pointer to structure variable is sent to function in C Programming Language.

This program is used to store and access “name, roll no. and marks ”  for many students using structures members.

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robaa
2022-11-24
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C Structure :

  • C Structure is a collection of different data types which are grouped together and each element in a C structure is called member.
  • If you want to access structure members in C, structure variable should be declared.
  • Many structure variables can be declared for same structure and memory will be allocated for each separately.
  • It is a best practice to initialize a structure to null while declaring, if we don’t assign any values to structure members.

Accessing Structure Members :

To access any member of a structure, we use the member access operator (.). The member access operator is coded as a period between the structure variable name and the structure member that we wish to access.

Below is the source code for C Program to understand how pointer to structure variable is sent to function which is successfully compiled and run on Windows System to produce desired output as shown below :

SOURCE CODE : :

/* Program to understand how a pointer to structure variable is sent to a function */


#include<stdio.h>
struct student {
                char name[20];
                int rollno;
                int marks;
               };
void display(struct student *);
void inc_marks(struct student *);
int main( )
{
        struct student stu1 = {"John", 12, 87};
        struct student stu2 = {"Snow", 18, 90};
        inc_marks(&stu1);
        inc_marks(&stu2);
        display(&stu1);
        display(&stu2);

        return 0;

}
void inc_marks(struct student *stuptr)
{
        (stuptr->marks)++;
}
void display(struct student *stuptr)
{
        printf("Name   - %s\t", stuptr->name);
        printf("Rollno - %d\t", stuptr->rollno);
        printf("Marks  - %d\n", stuptr->marks);
}

OUTPUT : :

//OUTPUT ::


Name   - John   Rollno - 12     Marks  - 88
Name   - Snow   Rollno - 18     Marks  - 91

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