31

by iff

32

by Dwarf45

33

by Ivan

34

by ss

35

by Fur trees

36

by ZyabakiN

37

by Katenyatkin

38

by victordm0394

39 0 vs NULL vs nullptr

by RiNSpy

40 namespace

by LaptevVV

41

by artilin

42

by Ivan

43 mutex for child-threads?

by turbocode

44 Virtual

by ksandro

45

by victordm0394

48

by Hetls

49

by StorFot

50

by ss

54

by drako08

55

by skarabay

58 Client - server

by Less

60 The calculator on Qt

by Marina Negina