Working with Structures in C Programming

In C programming, a structure (also called a struct) is a collection of related variables, known as members, grouped together under a single name. It is a user-defined data type that can be used to store a group of data items of different data types.
A structure is defined using the keyword "struct" followed by the name of the structure and a list of members enclosed in curly braces.

   Syntax :
        struct structure_name
        {
           datatype member_1 ;
           datatype member_2 ;
           datatype member_n ;
        }

This program is an example of how to use structures in C. It defines a structure called "student" with three members: name (a character pointer), age (an integer), and per (a float).
In the main function, it creates two variables of the struct student type "o" and "o2"
Then it assigns values to the members of the "o" struct variable. The member 'name' is assigned with a string "Tutor Joes" and 'age' is assigned with 30 and 'per' is assigned with 85.5
Then it uses the printf statement to print the values of the members of the "o" struct variable using the dot operator (.) to access them.

Source Code

//Structure in C
#include<stdio.h>
struct student
{
    char *name;
    int age;
    float per;
};
int main()
{
    struct student o,o2;
   /*
    printf("\nSize of Struct : %d",sizeof(o));//4
    printf("\nSize of char : %d",sizeof(char));//4
    printf("\nSize of int : %d",sizeof(int));//4
    printf("\nSize of float : %d",sizeof(float));//4
    */
    o.name="Tutor Joes";
    o.age=30;
    o.per=85.5;
 
    printf("\nName        : %s",o.name);
    printf("\nAge         : %d",o.age);
    printf("\nPercent     : %f",o.per);
 
    return 0;
}

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Output

Name        : Tutor Joes
Age         : 30
Percent     : 85.500000