![example
Union student
{
char name[200];
Int rollno;
Float marks;
};
1.Here student is a the name of union](https://image.slidesharecdn.com/cunion-190117163938/85/C-union-5-320.jpg)
![Declaration of union variable
method 1
Union student
{
Char name[200];
Int roll no;
Float marks;
};
Int main()
{
Union student student1;
Return 0;
}](https://image.slidesharecdn.com/cunion-190117163938/85/C-union-6-320.jpg)
![Declaration of union variable
method 2
Union student
{
Char name[200];
Int rollno;
Float marks;
}student1;
Int main()
{
Return 0;
}](https://image.slidesharecdn.com/cunion-190117163938/85/C-union-7-320.jpg)
![Program of union• #include<stdio.h>
• #include<string.h>
• union student
• {
• char name[200];
• int rollno;
• float marks;
•
• }student1;
• int main()
• {
•
• strcpy(student1.name,"ali");
• student1.rollno=201;
• student1.marks=78.5;
• printf("student name=%sn",student1.name);
• printf("student roll no=%dn",student1.rollno);
• printf("student marks=%fn",student1.marks);
• return 0;
• }](https://image.slidesharecdn.com/cunion-190117163938/85/C-union-9-320.jpg)
![Program of union• #include<stdio.h>
• #include<string.h>
• union student
• {
• char name[200];
• int rollno;
• float marks;
•
• }student1;
• int main()
• {
•
• strcpy(student1.name,"ali");
• student1.rollno=201;
• student1.marks=78.5;
• printf("student name=%sn",student1.name);
• printf("student roll no=%dn",student1.rollno);
• printf("student marks=%fn",student1.marks);
• return 0;
• }](https://image.slidesharecdn.com/cunion-190117163938/85/C-union-10-320.jpg)
C union
- 1. C union
- 2. Defination & introduction • Unions are con conceptually similar to structures • The syntax of union is also similar to that of structure • The only difference is in term of storage • In structure each member has its own storage location where the all members of union uses a single shared memory location which is equal to the size of its largest data member . • Data can of int,char,float,double etc .data type • It is a user defined data type Note-> union does not support multiple value it can store only one value at a time •
- 3. structure union Struct emp; union emp { { Char x; //size 1 byte char x; Float y;//size 4 byte float y; }e;}e; memory sharing x y x&y 5 byte 4 byte
- 4. syntax Keyword→ union structure _ name { data_ type variable 1; Body data_type variable 2; ……………………………. data _type variable n; };
- 5. example Union student { char name[200]; Int rollno; Float marks; }; 1.Here student is a the name of union
- 6. Declaration of union variable method 1 Union student { Char name[200]; Int roll no; Float marks; }; Int main() { Union student student1; Return 0; }
- 7. Declaration of union variable method 2 Union student { Char name[200]; Int rollno; Float marks; }student1; Int main() { Return 0; }
- 8. Accessing the data members of union • The data member of union can be accessed as Union_variable.data_mamber Example The rollno of student then we can write as Student1.rollno
- 9. Program of union• #include<stdio.h> • #include<string.h> • union student • { • char name[200]; • int rollno; • float marks; • • }student1; • int main() • { • • strcpy(student1.name,"ali"); • student1.rollno=201; • student1.marks=78.5; • printf("student name=%sn",student1.name); • printf("student roll no=%dn",student1.rollno); • printf("student marks=%fn",student1.marks); • return 0; • }
- 10. Program of union• #include<stdio.h> • #include<string.h> • union student • { • char name[200]; • int rollno; • float marks; • • }student1; • int main() • { • • strcpy(student1.name,"ali"); • student1.rollno=201; • student1.marks=78.5; • printf("student name=%sn",student1.name); • printf("student roll no=%dn",student1.rollno); • printf("student marks=%fn",student1.marks); • return 0; • }