Syntax: #define [ ,, …]
Here [,,…] is optional.
When you use this in the program then in the program this is called macro and #define directive only replaces the macro by before starting of actual compilation.
e.g :
#define pie 3.14
Void main()
{
float r=3,area;
area=3*r*pie;
printf(“%f”,area);
getch();
}
Before the starting of actual compilation an intermediate is formed which is :
We can see only in place of pie ,3.14 has pasted.
If is very long or we want to write in next line ,end first line by \.
e.g :
#define word c is powerful
language.
MACRO FUNCTION:
Related Links :
History Of C..
In the beginning was Charles Babbage and his Analytical Engine, a machine
he built in 1822 that could be programmed to carry out different computations.
Move forward more than 100 years, where the U.S. government in
1942 used concepts from Babbage’s engine to create the ENIAC, the first
modern computer.
Meanwhile, over at the AT&T Bell Labs, in 1972 Dennis Ritchie was working
with two languages: B (for Bell) and BCPL (Basic Combined Programming
Language). Inspired by Pascal, Mr. Ritchie developed the C programming
language.
My 1st Program...
#include
#include
void main ()
{
clrscr ();
printf ("\n\n\n\n");
printf ("\t\t\t*******Pankaj *******\n");
printf ("\t\t\t********************************\n");
printf ("\t\t\t\"Life is Good...\"\n");
printf ("\t\t\t********************************");
getch ();
}
Next Step...
#include
#include
void main ()
{
clrscr ();
printf ("\n\n\n\n\n\n\n\n");
printf ("\t\t\t --------------------------- \n\n");
printf ("\t\t\t | IGCT, Info Computers, INDIA | \n\n");
printf ("\t\t\t --------------------------- ");
getch ();
}
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