Union within Structure

Union within Structure

#include<stdio.h>

#include<stdlib.h>

#include<string.h>

struct student

{

            int marks;

            union

            {

                        char name[20];

                        int usn;

            } u;

} s;

main()

{

            int  ch;

            printf("\n Enter marks:");

            scanf("%d", &s.marks);

            printf("\nName or USN choice:");

            printf("\n 1.Name 2.USN: ");

            scanf("%d", &ch);

            switch(ch)

            {

                        case 1:             printf("\nEnter name:");

                                                scanf("%s", s.u.name);

                                                printf("\nYour name is:%s", s.u.name);

                                                break;

                        case 2:             printf("\nEnter usn:");

                                                scanf("%d", &s.u.usn);

                                                printf("\nYour usn is:%d", s.u.usn);

                                                break;

            }

            printf("\nYour marks is:%d", s.marks);

}

Output:

Enter marks: 80

Name or USN choice:

1.Name 2.USN:            1

Enter name: AAAAA

Your name is: AAAAA

Your marks is: 80