Relation between Pointers and Functions - Passing a pointer to a function is known as call by reference and function works on actual variables in that case
- void copy(char *s1, char*s2) { while ((*s1++ = *s2++) != ‘\0’ }
- Pointer parameters are very common in string functions like above
- *s++ and *++s are different!
- type (*ptr)() is a pointer to a function with return type as type
- It is different than type *ptr()
- double (*p1)(), mul();
- p1 = mul;
- (*p1) (x,y) is same as mul(x,y)
- It is used in system programming
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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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