C Program to understand how pointer to structure returned from function
Write a C Program to understand how pointer to structure returned from function. Here’s a Simple Program where we are going to find how the pointer to structure returned from a function in C Programming Language.
This program is used to store and access “name, roll no. and marks ” for many students using array of structures members.
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 : :
C structure can be accessed in 2 ways in a C program. They are,
Dot(.) operator is used to access the data using normal structure variable and arrow (->) is used to access the data using pointer variable.
Below is the source code for C Program to understand how pointer to structure returned from 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 is returned from a function */ #include<stdio.h> #include<string.h> #include<stdlib.h> struct student { char name[20]; int rollno; int marks; }; void display(struct student *); struct student *func( ); struct student *ptr; int main( ) { struct student *stuptr; stuptr = func( ); display(stuptr); free(stuptr); return 0; } struct student *func( ) { ptr = (struct student *) malloc(sizeof(struct student) ); strcpy( ptr->name, "Joseph"); ptr->rollno = 15; ptr->marks = 98; return ptr; } void display( struct student *stuptr) { printf("Name - %s\n", stuptr->name); printf("Rollno - %d\n", stuptr->rollno); printf("Marks - %d\n", stuptr->marks); }
OUTPUT : :
//OUTPUT :: Name - Joseph Rollno - 15 Marks - 98
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