C Programming

1
C Programming

• Mahsa Eshraghi

2
What is GCC?

• GCC is the compiler system for
• Unix-compatible operating system.

3
What is Relocatable Object Code?

• Machine code that is generated by compilers and
  assemblers and stored in relocatable object files
  or .o files.

4
The printf() function

• Printf or print-formatted
• Print(..Hello world)
• Print(Integer d, someInteger)
• main ()
• printf ("Astronomy is d derful \n",1)
• printf ("And interesting d \n",2)
• Output
• Astronomy is 1derful
• And interesting 2

5
The rand() function

• Random number generator, which generates integers
  in the range 0,RAND_MAX
• To generate a random floating point in the range
  0,1) (including 0, not including 1) use
  r(  rand() / (RAND_MAX1.0) )
• To generate a random integer in the range 0,6)
  r 6.0( rand() / (RAND_MAX1.0) )
• To generate a random integer in the range 1,7)
• r 1 6.0( rand() / (RAND_MAX1.0) )

6
Local and Global Variables

• Local
• main()
• int i4
• i
• Global
• int i4
• main()
• i

7
Global and Internal variables

• int i4 / Global definition /
• main()
• i / global variable /
• func
• func()
• int i10 / Internal declaration /
• i / Internal variable /