Session 4 Printf

PRINTF
1. It will print 1st Argument on Screen (Except format Specifier %d , which will be Replaced )
	Syntax=>	printf("arg1",arg2,arg3,.....,argn);
2. 1st Arg must be in pair of Double quotes ("").
3. If there is more than 1 arg, then those arg can be seperated by commas (,).

Example:
printf("hello")  Semicolon (;) Syntax error
printf("hello");     hello
printf("  hello    ");  (space)hello(space)
printf("hello %d",10);   hello 10
printf("hello %d hello %d %d",10,20,30); hello 10 hello 20 30
1st Format Specifier (%d) => 2nd Arg (10)
2nd FS => 3rd Arg
3rd FS => 4th Arg
Nth FS => (N+1)Arg
printf("%d%d%d",10,20,30); 102030
printf("%d %d %d",10,20,30); 10 20 30
printf("%d %d %d",10,20); 10 20 GV
printf("%d %d %d",10); 10 GV GV
printf("%d %d %d"); GV GV GV
Note: For a given format Specifier if there is no arg, then result is Garbage Value(GV)
Garbage value can any value stored by compiler.
printf("%d %d",10,20,30,40); 10 20

printf("%d",10+20); 30  here '+' act as Operator
printf("10+20"); 10+20  here '+' is meant for printing
printf("%d,%d",10,20); 10,20
1st Comma is for printing
Next 2 Commas is for seperating arguments

printf("%d + %d",2+0); 2 + Gv
printf("%d * %d = %d",5,2,5+2); 5 * 2 = 7
* Meant for printing
+ Meant for Adding values
printf("%f",3.6); 3.600000
printf("%d",3.0); Gv
!X!X!X!X!X!  Format Specifier Cannot convert the data from one type to another type. It just print only the data specified.
printf("%f",3); Gv
printf("%d",100.6); Gv
printf("%f",5/2); Gv
printf("%d",3.0/2); Gv
printf("%f",3.0/2); 1.5
printf("%f",3.0%2); Error ----> % does not act on float value
printf("%f",-5%2); Gv
printf("Hello","hai","bye"); hello
>>> Since there is NO FORMAT SPECIFIER in 1st Arg, it does not go to the second arg.
Exercise
1. printf("  %d ",0 );   0
2. printf("  %f",-3);   Gv
3. printf("  %d ",3/4/1); 0
4. printf("  %f",3+5*1); GV
5. printf("  %f ", 12-5.0*2 );  2.0000000
6. printf("  %i",-3.0);  GV
7. printf("  %f %i %c %d ",0.1,10,0,11); 0.1 10 GV 11
8.  printf("%d %d %d", "%d %d" ,10 ,20 ,30 ,40 ,50); GV 10 20

int amt=8500;
9.  printf(amt);   Error Absence of " "
10. printf("  %f ",amt-amt); GV
11. printf("amt");  amt
12. printf("%d",amt); 8500
13. printf("amt = %d");  amt = gv
14. printf("amt = %d",amt); amt = 8500
15. printf("%d+1000",amt);  8500+1000
16. printf("%d",amt+1000); 9500
17.  printf(" amt+ 1000 " ); amt+1000
18. printf("  %d + %d = %d ",amt,amt,amt );  8500 + 8500 = 8500
19. printf("  %d ",amt+500); 9000
20. printf("  amt = %d + %d",amt+100); amt = 8600 + GV
21. printf("  %d ",amt=amt+100);  8600