C Programming Course - Level 1

1. C Programming Language
Mo’meN Ali

2. Course Contents
• Introducing C.
• Data and C.
• Character Strings and formatted input/output.
• Operators, Expressions and Statements.
• C Control Statements: looping.
• C Control Statements: Branching and jumping.
• Character input/output and input validation.
• Functions.

3. • Arrays and Pointers.
• Character Strings and String Functions.

4. Introducing C language

6. The seven steps of programming
1 - Define the program objectives.
2 - Design the program.
3 - Write the code.
4 - Compile.
5 - Run the program.
6 - Test and debug the program.
7 - Maintain and modify the program.

7. C Strengths
• Efficiency.
• Portable.
• Power & Flexibility.
• Fast.
• Favourable language when interacting with hardware.
• Small and Compact.

8. C Weakness
• Not OOP.
• Programming in C needs responsibility.

9. How Does a C Program looks like ?!
#include <stdio.h>
int main(void)
{
printf("Concrete contains gravel and cement.n");
return 0;
}

10. Output
Concrete contains gravel and cement.

11. /* a simple program */
#include <stdio.h>
int main(void)
{
int num; /* define a variable called num */
num = 1; /* assign a value to num */
printf("I am a simple "); /* use the printf() function */
printf("computer.n");
printf("My favorite number is %d because it is first.n",num);
return 0;
}

12. Output
I am a simple computer.
My favorite number is 1 because it is first.

13. Explanation
• #include /* Preprocessor instructions. */
• int main(void) /* main is the first function to be
called always. */
• Statements. /* functions are made up of
statements.*/
• Function: a(), b(), c() /* usually we write another
functions within a program. */
// I am a comment.
/* I am the twin brother of comment. */

14. // fathm_ft.c -- converts 2 fathoms to feet
#include <stdio.h>
int main(void)
{
int feet, fathoms;
fathoms = 2;
feet = 6 * fathoms;
printf("There are %d feet in %d fathoms!n", feet, fathoms);
printf("Yes, I said %d feet!n", 6 * fathoms);
return 0;
}

15. Output
There are 12 feet in 2 fathoms!
Yes, I said 12 feet!

16. ISO/ANSI C Keywords
auto enum restrict unsigned
break extern return void
Case float short volatile
char for signed while
const goto sizeof _Bool
continue if static _Complex
default inline struct _Imaginary

17. do int switch
double long typedef
else register union