C Structure in C Language

Categories: C language

Why use structure?

In C, there are cases where we need to store multiple attributes of an entity. It is not necessary that an entity has all the information of one type only. It can have different attributes of different data types. For example, an entity Student may have its name (string), roll number (int), marks (float). To store such type of information regarding an entity student, we have the following approaches:


1. Construct individual arrays for storing names, roll numbers, and marks.

2. Use a special data structure to store the collection of different data types.


Let's look at the first approach in detail.


#include<stdio.h>  

void main ()  

{  

  char names[2][10],dummy; // 2-dimensioanal character array names is used to store the names of the students   

  int roll_numbers[2],i;  

  float marks[2];  

  for (i=0;i<3;i++)  

  {  

      

    printf("Enter the name, roll number, and marks of the student %d",i+1);  

    scanf("%s %d %f",&names[i],&roll_numbers[i],&marks[i]);  

    scanf("%c",&dummy); // enter will be stored into dummy character at each iteration  

  }  

  printf("Printing the Student details ...\n");  

  for (i=0;i<3;i++)  

  {  

    printf("%s %d %f\n",names[i],roll_numbers[i],marks[i]);  

  }  

}  


Output

Enter the name, roll number, and marks of the student 1Arun 90 91        

Enter the name, roll number, and marks of the student 2Varun 91 56      

Enter the name, roll number, and marks of the student 3Sham 89 69


Printing the Student details...

Arun 90 91.000000                                                                      

Varun 91 56.000000  

Sham 89 69.000000

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