This document provides examples of algorithms and program development methodologies. It discusses problem solving steps, program development cycles like waterfall method, and control structures like sequence, selection, and loops. Examples provided include finding the largest of three numbers, calculating the area of a circle, and reversing a number. Pseudocode and flowcharts are used to represent the algorithms.

1. UNIT - 3 PROBLEM SOLVING AND OFFICE AUTOMATION

5. Program planning method Specification Review Informal Design Test & Debug Coding Formal Design Maintaining

9. Waterfall method Feasibility Analysis Maintenance Testing Impl Design

34. Example START C=a+b Print c Read a,b STOP

37. Example Start Read a If a>0 Print a is Positive Stop no yes

39. Example Start Read a,b If a>b Print a is Greater Print b is Greater Stop no yes

41. start stop Read m1,m2,m3 Avg=(m1+m2+m3)/3 If Avg>=60 If Avg>=50 If Avg>=35 Fail Print First Class Print Second Class Print Third Class Example: Finding the Grade

44. Example Start Num=0 Num=Num+1 Print Num while Num<5 stop no yes

46. Example Start Num=0 Num=Num+1 Print Num while Num<5 stop no yes

49. Flowchart START area=3.14*r*r Print area Read r STOP

52. Flowchart START Print b Is largest Read a,b,c stop If (a>b) and (a>c) If b>c Print a Is largest Print c Is largest no yes yes no

56. Flow chart Start Stop D=b*b-4*a*c Root1=[-b+sqrt(D)]/(2*a) Root2=[-b+sqrt(D)]/(2*a) Read a,b,c Print root1,root2 If D>=0 no yes Print roots are imaginary

60. Flowchart START c = a a = b b = c Print a, b Read a, b STOP

63. Flowchart START a = a + b b = a - b a = a - b Print a, b Read a, b STOP

66. Flowchart Start Read year year % 4 ==0 Print It is a Leap year Print It is not a Leap year Stop no yes

69. Flowchart Start Read n i = 1 fact=fact * i i=i+1 Print fact while i<=n stop no yes

72. Flowchart Start r = 0,sum=0 r=n%10 sum=sum + r n=n/10 Print sum while n>0 stop no yes Read n

75. Flowchart Start r = 0,sum=0 r=n%10 sum=sum *10 + r n=n/10 Print sum while n>0 stop no yes Read n

79. Flowchart Start a = n,sum=0 r=n%10 sum=sum + r*r*r n=n/10 Print Armstrong No while n>0 stop no yes Read n if a=sum Print It is Not an Armstrong No

83. Flowchart Start f=0,f1= -1,f2=1 f=f1+f2 f1=f2 f2=f Print f while f<n stop no yes Read n

86. Flowchart START Fahrenheit = (1.8* Celsius) + 32 Print Fahrenheit Read Celsius STOP

89. Flowchart START Celsius =(Fahrenheit – 32)/1.8 Print Celsius Read Fahrenheit STOP

92. Flowchart Start sum=0,i=1 sum=sum+i i=i+2 Print sum stop Read n While i<=n

95. Flowchart Start sum=0,i=0 sum=sum+i i=i+2 Print sum stop Read n While i<=n

98. Flowchart Start sum=0,i=0 Print sum stop Read n While n>0 r=n%10 sum=sum + r*Pow(2,i) n=n/10 i=i+1

99. Application software Packages