Structure OF Using Pointer To C Program

C structure using pointer

#include 

#include 

#include 

struct student 

{

     int id;

     char name[30];

     float percentage;

};

int main() 

{

     int i;

     struct student record1 = {1, "Raju", 90.5};

     struct student *ptr;

     ptr = &record1;     

         printf("Records of Student1: \n");

         printf("  Id is: %d \n", ptr->id);

         printf("  Name is: %s \n", ptr->name);

         printf("  Percentage is: %f \n\n", ptr->percentage);

     return 0;

}

Output

Records of Student1:
Id is: 1
Name is: Raju
Percentage is: 90.500000

Copy a structure in C

#include 

#include

#include 

struct student 

{

    int id;

    char name[30];

    float percentage;

};

int main() 

{

    int i;

    struct student record1 = {1, "Raju", 90.5};

    struct student record2, *record3, *ptr1, record4;

    printf("Records of Student1 - record1 structure \n");

    printf("  Id : %d \n  Name : %s\n  Percentage : %f\n",

            record1.id, record1.name, record1.percentage);

    record2=record1;    

    printf("\nRecords of Student1 - Direct copy from " \ "record1 \n");

    printf("  Id : %d \n  Name : %s\n  Percentage : %f\n", 

            record2.id, record2.name, record2.percentage);

    ptr1 = &record1; 

    memcpy(record3, ptr1, sizeof(record1));

    printf("\nRecords of Student1 - copied from record1 " \"using memcpy \n");

    printf("  Id : %d \n  Name : %s\n  Percentage : %f\n", 

           record3->id, record3->name, record3->percentage);

    printf("\nRecords of Student1 - Copied individual " \

           "members from record1 \n");

    record4.id=record1.id;

    strcpy(record4.name, record1.name);

    record4.percentage = record1.percentage;

    printf("  Id : %d \n  Name : %s\n  Percentage : %f\n", 

            record4.id, record4.name, record4.percentage);

     return 0;

}

Output

Records of Student1 - record1 structure
Id : 1
Name : Raju
Percentage : 90.500000
Records of Student1 – Direct copy from record1
Id : 1
Name : Raju
Percentage : 90.500000
Records of Student1 – copied from record1 using memcpy
Id : 1
Name : Raju
Percentage : 90.500000
Records of Student1 – Copied individual members from record1
Id : 1
Name : Raju
Percentage : 90.500000

Structure within structure in C using normal variable

#include 

#include 

struct student_college_detail

{

    int college_id;

    char college_name[50];

};

struct student_detail 

{

    int id;

    char name[20];

    float percentage;

    struct student_college_detail clg_data;

}stu_data;

int main() 

{

    struct student_detail stu_data = {1, "Raju", 90.5, 71145,

                                       "Anna University"};

    printf(" Id is: %d \n", stu_data.id);

    printf(" Name is: %s \n", stu_data.name);

    printf(" Percentage is: %f \n\n", stu_data.percentage);

    printf(" College Id is: %d \n", 

                    stu_data.clg_data.college_id);

    printf(" College Name is: %s \n", 

                    stu_data.clg_data.college_name);

    return 0;

}

Output

Id is: 1
Name is: Raju
Percentage is: 90.500000

College Id is: 71145
College Name is: Anna University