Register:
Data
in the machine language version of a program is normally loaded into registers
for calculations and other processing. As the register memory is very limited,
the compiler may ignore register declarations.
Example:
#include<stdio.h>
#include<conio.h>
int
main()
{
int
a,b;
register
int c=1;
clrscr();
printf(“Enter
first number\n”);
scanf(“%d”,&a);
printf(“Enter
second number\n”);
scanf(“%d”,&b);
c=a+b;
printf(“the
sum of %d and %d is %d”,a,b,c);
getch();
return
0;
}
OUTPUT:
Enter
first number
10
Enter
second number
20
The
sum of 10 and 20 is 30
In
the above program, the declaration register in c=1; suggest that the integer variable ‘c’ be replaced in one
of the computers registers and initialized to 1:
Keyword
register cannot be used with global
variables as the register memory will be held up during the entire program
execution.
