code

#include <stdio.h>
#include <string.h>

struct student
{
    char name[100];
    int roll;
    float cgpa;
};

typedef struct ComputerEngineeringStudent
{
    int roll;
    float cgpa;
    char name[100];
} coe;

void printInfo(struct student s1);

typedef struct student
{
    int roll;
    float cgpa;
    char name[100];
} stu;
typedef struct computerengineeringstudent
{
    int roll;
    float cgpa;
    char name[100];
} coe;
struct address
{
    int houseNo;
    int block;
    char city[100];
    char state[100];
};
struct vector
{
    int y;
};
void calcSum(struct vector v1, struct vector v2, struct vector sum);
struct complex
{
    int real;
    int img;
};
typedef struct BankAccount
{
    int accountNo;
    char name[100];
} acc;

int main()
{
    struct student s1;
    strcpy(s1.name, "Shradha");
    s1.roll = 64;
    s1.cgpa = 9.2;

    printf("Student info : \n");
    printf("name : %s\n", s1.name);
    printf("roll no : %s\n", s1.roll);
    printf("cgpa : %s\n", s1.cgpa);

    // array of structures
    struct student IT[60];
    struct student COE[60];
    struct student ECE[60];

    // declaration
    struct student s2 = {"Rajat", 1552, 8.6};
    struct student s3 = {0};

    printf("Roll no of s2 = %d\n", s2.roll);
    printf("Roll no of s3 = %d\n", s3.roll);

    // pointer to structures
    struct student *ptr = &s1;
    printf("student.name = %s\n", (*ptr).name);
    printf("student.roll = %d\n", (*ptr).roll);
    printf("student.cgpa = %f\n", (*ptr).cgpa);

    // arrow operatord
    printf("student->name = %s\n", ptr->name);
    printf("student->roll = %d\n", ptr->roll);
    printf("student->cgpa = %f\n", ptr->cgpa);

    printInfo(s1);

    // typedef keyword
    coe student1;
    student1.roll = 1664;
    student1.cgpa = 6.7;
    strcpy(student1.name, "sudhir");

    acc acc1 = {123, "shradha"};
    acc acc2 = {124, "rajat"};
    acc acc3 = {125, "sudhir"};
    printf("acc no = %d", acc1.accountNo);
    printf("name = %s", acc1.name);

    return 0;
}

void printInfo(struct student s1)
{
    printf("student info : \n");
    printf("name =  %s\n", s1.name);
    printf("roll no =  %d\n", s1.roll);
    printf("cgpa =  %f\n", s1.cgpa);
    s1.roll = 1660;
}

void calcSum(struct vector v1, struct vector v2, struct vector sum)
{
    sum.x = v1.x + v2.x;
    sum.y = v1.y + v2.y;
    printf("sum of x is : %d\n", sum.x);
    printf("sum of y is : %d\n", sum.y);
}