1. Liza Fireman Tutorial #3 Summer 2005

2. Liza Fireman Keywords whilevolatilevoidunsigned uniontypedefswitchstruct staticsizeofsignedshort returnregisterLongint ifgotoforfloat externenumelsedouble dodefaultcontinueconst charcaseautobreak

3. Liza Fireman Names – legal or not? the_one temp do_it! intro2cs drink-me 1st_street counter ! is not legal - is not legal 1 can not be first

4. Liza Fireman Names – legal or not? int the_num, the_Num; double Double; double main; int printf;

5. Liza Fireman Significat names cst = wh * pphr + prt; pt = cst * (1 + v); total_cost = work_hours * price_per_hour + parts_cost; payment = total_cost * (1 + vat);

6. Liza Fireman 2020 21212 2323 2424 2525 2626 2727 Types 2 bytes = 16 bits  32,000 4 bytes = 32 bits  2,000,000,000 short int long ≥≥ 10110000 = 2 0 + 2 2 + 2 3 = 1 + 4 + 8 = 13

7. Liza Fireman Hello World Program 2 bytes = 16 bits  65,000 4 bytes = 32 bits  4,000,000,000 unsigned short unsigned int unsigned long

8. Liza Fireman Types float double long double ≥≥ חזקהמנטיסה± חזקה 10  מנטיסה ± =

9. Liza Fireman Types 5000, -30 256L, 30l 256U, 30u 12300ul 1234567UL 1.5, -3.0, 4.2e5, 10e-60 36.7F, 4.2e+5f 36.7L,.5l

10. Liza Fireman Characters - ASCII ‘7’55 ‘8’56 ‘9’57 ‘:’58 ‘;’59 ‘<‘60 ‘=‘61 ‘A’65 ‘B’66 ‘C’67 ‘D’68 ‘E’69 ‘F‘70 ‘G‘71 ‘a’97 ‘b’98 ‘c’99 ‘d’100 ‘e’101 ‘f‘102 ‘g‘103

11. Liza Fireman chars #include int main() { char ch = ‘a’; char ch2 = 67; }

12. Liza Fireman chars #include int main() { char ch = 65; printf(“%d\n”, ch); printf(“%c”, ch); } 65 A

13. Liza Fireman chars #include int main() { printf(“%c %d\n”, 97, 97); } a 97

14. Liza Fireman chars #include int main() { printf(“%c %d\n”, ‘b’, ‘b’); } b 98

15. Liza Fireman chars #include int main() { printf(“%c %c %c\n”, ‘b’, ‘b’+1, ‘b’ + 2); } b c d

16. Liza Fireman chars #include int main() { char letter; printf("Enter a lowercase letter: "); scanf("%c", &letter); printf("In uppercase: %c", (letter - 'a') + 'A'); } Enter lowercase letter: f In uppercase: F

17. Liza Fireman getchar #include int main() { char letter; printf("Enter a lowercase letter: "); letter = getchar(); printf("In uppercase: %c", (letter - 'a') + 'A'); }

18. Liza Fireman Types char → short → int → long → float → double → long double 7 / 3 7.0 / 3 7 / 3.0 = 0

19. Liza Fireman Types int apples = 30, children = 12; double juice_from_apple = 0.1; double tot_orange_juice = 5.4; double liters_per_cup = 0.3; double orange_juice_per_child = tot_orange_juice / children; double apple_juice_per_child = (apples / children) * juice_from_apple; double total_juice_per_child = orange_juice_per_child + apple_juice_per_child; double / int int * double double + double int / int

20. Liza Fireman Types int apples = 30, children = 12; double juice_from_apple = 0.1; double tot_orange_juice = 5.4; double liters_per_cup = 0.3; … int minimum_cups_per_child = total_juice_per_child / liters_per_cup; double / double int = double

21. Liza Fireman casting #include int main() { double d; d = (double)3 / 2; }

22. Liza Fireman casting #include int main() { int x = 2; printf(“%lf”, (double)x); }

23. Liza Fireman casting #include int main() { int cake_num = 5, children = 3; double cake_per_child = } cake_num / children

24. Liza Fireman casting #include int main() { int cake_num = 5, children = 3; double cake_per_child = } (double)cake_num / children

25. Liza Fireman casting #include int main() { int cake_num = 5, children = 3; double cake_per_child = } cake_num / (double)children

26. Liza Fireman casting #include int main() { int cake_num = 5, children = 3; double cake_per_child = } (double)(cake_num / children)

27. Liza Fireman operators a%ba/ba*ba-ba+b a>=ba<=ba>ba<ba!=ba==b a%=ba/=ba*=ba-=ba+=ba=b a||ba&&b --aa--++aa++

28. Liza Fireman Operators אסוציאטיביותאופרטורים משמאל לימין() [] ->. מימין לשמאל! ~ ++ -- + - * & (type) sizeof משמאל לימין* / % משמאל לימין+ - משמאל לימין > משמאל לימין >= משמאל לימין== != משמאל לימין& ^ | && משמאל לימין|| מימין לשמאל?: מימין לשמאל= += -= */ /= %= &= ^= |= >= משמאל לימין,

29. Liza Fireman Operators int main() { char c; int t = 5, s = 7 ; double x = 8.5, y = 7.2 ; c = 'a' ; t = c + 1; c = t; printf("c = %c\n", c); t = (t - 'a' + 3) * x; s = s * y; printf("t = %d, s = %d\n", t, s); … } c=b t = 34 s = 50 ‘a’ + 1 = ‘b’ = 98 ‘b’ - ‘a’ + 3 = 1 + 3 = 4 4 * 8.5 = 34 7 * 7.2 = 50.4

30. Liza Fireman Operators int main() { char c; int t = 5, s = 7 ; double x = 8.5, y = 7.2 ; … x = (int)(y * s); y = (int)y * s; printf(“x = %lf, y = %lf\n", x, y); return 0 ; } x=360.000000, y=350.000000 7.2 * 50 = 360 7 * 50 = 350

31. Liza Fireman Operators int x, y; x = 8 ; y = ++x; printf(“x = %d y = %d”,x,y); x=9, y=9 x= x + 1; y = x;

32. Liza Fireman Operators int x, y; x = 8 ; y = x++; printf(“x = %d y = %d”, x,y); x=9, y=8 y = x ; x= x + 1 ;

33. Liza Fireman Operators int n = 5, x, y; x = n++; y = ++n; printf(  x = %d, y = %d , x, y ) ; x=5, y=7

34. Liza Fireman Operators int x = 5, y ; y = -x + x ; y = ++x ; y = x++ ; x = ++x + x++ ; -5 + 5 = 0 x = 7, y = 6 x = 6, y= 6

35. Liza Fireman Int and double 10 + 20 – 5 – 2 10 * 20 / 8 / 5 10 + 20 * 5 x = 4; y = 5; z = y += x *= 5; = 23 = 5 = 110

36. Liza Fireman getchar #include int main() { char ch; ch = getchar(); if ((ch >= ‘a’ && ch = ‘A’ && ch <= ‘Z’) printf(“a letter”); else printf(“not a letter”); }