Example:
If we want to use the personal information of an employee in a
compressed form.
struct
personal
{
unsigned sex:
1
unsigned age:
7
unsigned
mstatus : 1
unsigned
children : 3
} emp;
·
This defines a variable name
emp with four fields.
·
The range of values each field
could have are as follows:
·
Once bit fields are defined,
they can be referenced just as any other structure-type data item would be
referenced.
·
The following assignment
statements are valid.
emp.sex=1;
emp.age=50;
sum=sum+emp.age;
printf("%od",emp.age);
·
It is possible to combine
normal structure elements with bit field elements.
struct
personal
{
char
name[20]; // normal variable
struct add
address; //structure variable
unsigned
sex:1;
unsigned age:7;
}
Command line Arguments
·
Command line arguments are the
values supplied to the command prompt at execution time.
·
We can give parameters to
main() with the help of the command line arguments main (int argc, char * argv
[])
·
argc refers to arguments count.
It returns a value which is equal to total number of arguments passed through
the main() .
·
argv refers to argument vector.
It is a pointer to an array of character strings which contains values of
arguments.
Example:
argv [0] -
first string
argv [1] -
second string
In general
argv [0] is an executable file to run the program.
