Computer science 10 th

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1 Computer science 10 th Prepared by: SYED ALI RAZA (BSCS) Virtual University (pk) Administrator: SOHAIL ASHRAF Takbeer Science Academy &School (M.B.DIN) Chap no 1: Problem Solving Some basic symbols of flow chart Start and end Process Input / Output Decision making Connector Off page/ On page Connector Predefined process Arrow for direction HONESTY IS THE BEST POLICY

2 Question no 1: (in book ques no:08) Draw a flow chart to find the largest of three numbers Sol: start I/P a,b,c IF b>a b>c NO NO IF a>b a>c IF c>a c>b YES Print a Print b Print c END

3 Question no 2: (in book ques no:09) Write an algorithm to calculate the area of a circle whwn the radius is given (area=π 2 r ) Sol: Type Start Input Process Output Stop work / action start procedure input (value of radius) compute area of circle print area end the procedure Question no 3: (in book ques no:10(x) ) Write an algorithm to calculate the distance covered by car moving at an average 1 speed of vms in time t.the program should input average speed v and t. Hint (s= vt ) where s is the distance traveled. Sol: Type work / action Start start procedure Input input (average speed and time v, t ) Process compute distance (s) Output print the value of s (distance ) Stop end the procedure Prepared by: SYED ALI RAZA TAKBEER SCIENCE SCHOOL (M.B.DIN)

4 Chap no 02: Data type,assignment and Input /Output statement Question no 1:( in book ques no : 09) Write a program to read ten values specified in Data statement and display the sum of these values on the screen. 20 Read a,b,c,d,e,f,g,h,,i,j (declare variable using read data statement) 30 S=a+b+c+d+e+f+g+h+i+j (process) 40 print The sum of ten values is= ;S (For display result) 50 Data 1,2,3,4,5,6,7,8,9,10 (assign values to variables) 60 end The sum of ten values is=55 Question no 2:( in book ques no : 10(ix) ) Write a program that asks for the name,roll number,class,section and marks in different subjects of a student of class 10.The program should calculate and display total marks and percentage of a student ( using INPUT statement) 20 input plz enter student s name: ;n 30 input plz enter student s roll no: ;r 40 input plz enter student s class: ;c 50 input plz enter student s section: ;s 60 input plz enter obt marks in eng: ;e 70 input plz enter obt marks in phy: ;p 80 input plz enter obt marks in mth: ;m 90 input plz enter obt marks in pak st: ;pk 100 input plz enter obt marks in comp: ;cs 110 input plz enter obt marks in urdu: ;u 120 input plz enter obt marks in chem: ;ch 130 total=e+p+m+pk+cs+u+ch 140 avg=(total/850)* print the total marks is= ;total 160 print the percentage is= ;avg 170 end

5 Question no 3:( in book ques no : 10(x) ) Write a program to calculate the distance by a car moving at an average speed of 1 vms in time t. the program should input average speed and time (using input statement) 20 input plz enter the value of v= ;v 30 input plz enter the value of t= ;t 40 S=v*t 50 print the total distance is = ;S 60 end Output : plz enter the value of v=4 plz enter the value of t=3 the total distance is =12 Question no 4:( in book ques no : 11 ) Write a program to calculate the volume of cylinder.the program should get the value for height of the cylinder and radius of its base from the user through INPUT statement. Hint:( volume = 2 π r h ) 20 pi=3.14 (fix value) 30 input plz enter the value of height= ;h 40 input plz enter the value of radius= ;r 50 V=pi*r^2*h 60 print The volume of the cylinder is= ;V 70 end plz enter the value of height=2 plz enter the value of radius=2 The volume of the cylinder is=25.12

6 Question no 5:( in book ques no : 12 ) Write a program to calculate the square of given number.the program should get the number from the user through INPUT statement. 20 input plz enter the number do u want to square = ;n 30 let S=n*n 40 print The square is = ;S 50 end plz enter the number do u want to square =5 The square is =25 Question no 6:( in book ques no : 13 ) Write a program to calculate and print the sum and average of three number using LET statement. 20 let a=2 30 let b=3 40 let c=4 50 let d=a+b+c 60 let avg=d/3 70 print the sum of three numbers is= ;d 80 print the average of three numbers is= ;avg 90 end the sum of three numbers is=9 the average of three numbers is=3 Prepared by: SYED ALI RAZA TAKBEER SCIENCE SCHOOL (M.B.DIN)

7 Chap no 3: Control Structures Question no 1:( in book ques no : 8 ) Write a program to calculate the area of the triangle.the program should get the values for base and altitude of the triangle from the user and the result. Hint :(area =1/2*base*altitude) 20 input plz enter the value of base= ;b 30 input plz enter the value of altitude= ;a 40 area=1/2*b*a 50 print The area of the triangle is= ;area 60 end plz enter the value of base=2 plz enter the value of altitude=3 The area of the triangle is=3 Question no 2:( in book ques no : 9 ) Write a program to calculate the area and circumference of the circle.the program should get the radius of the circle and display result. Hint:(cir= 2π r and 2 area= π r ) 20 input plz enter the value of radius= ;r 30 pi= A=pi*r^2 50 C=2*pi*r 60 print The area of the circle is= ;A 70 print The circumference of the circle is= ;C 80 end plz enter the value of radius=3 The area of the circle is=28.26 The circumference of the circle is=18.84

8 Question no 3:( in book ques no : 10 ) Write a program to print first ten odd numbers using WHILE WEND loop. 20 A=1 30 While A<=19 40 print A 50 A=A+2 60 Wend 70 end Question no 4:( in book ques no : 11 ) Write a program to print the sum of squares of first five even numbers using FOR NEXT loop. 20 sum=0 30 For A=2 to 10 step 2 40 SUM=SUM+A 50 Next A 60 S=SUM*SUM 70 Print the sum of first five even numbers is= ;SUM 80 Print the square of sum of even numbers is= ;S 90 end the sum of first five even numbers is=30 the square of sum of even numbers is=900

9 Question no 5:( in book ques no : 12 ) Write a program to find the larger of two numbers. The program should get the numbers from the user. 20 input plz enter the first number= ;a 30 input plz enter the second number= ;b 40 IF a>b then largest=a 50 IF b>a the largest=b 60 print the larger number is = ;largest 70 end plz enter the first number=6 plz enter the second number=8 the larger number is =8 Question no 6:( in book ques no : 13 ) Write a program to print the table of the given numbers.the program should get the number from the user. 20 input plz enter the number= ;n 30 For T=1 to print n, *,T, =,t*n 50 Next T 60 end Output : plz enter the number=3 3 * 1= 3 3 * 2= 6 3 * 3= 9 3 * 4= 12 3 * 5= 15 3 * 6= 18 3 * 7= 21 3 * 8= 24 3 * 9= 27 3 * 10= 30

10 An other solution in which user selects the starting and ending point of table. 20 input Give the number for table= ;a 30 input Give the starting number = ;b 40 input Give the number for count= ;c 30 For T=b to c 40 print a, *,T, =,t*a 50 Next T 60 end Output : Give the number for table=4 Give the starting number =3 Give the number for count=6 4 * 3 =12 4 * 4 =16 4 * 5 = 20 4 * 6= 24 Chap no 4: ARRAYS Question no 1:( in book ques no : 14 ) Write a program to print a list of odd numbers from the given numbers 6,42,4,77,32,9,21,22,8,45,15,46 Sol: 20 DIM A(12) 30 FOR B=1 to Read A(B) 50 IF A(B) mod 2 <>0 then print A(B) 60 Next B 70 Data 6,42,4,77,32,9,21,22,8,45,15,46 80 end Output :

11 Question no 2:( in book ques no : 17 ) Find out the errors in the following program segments if any? 10 DIM N$(10) 20 FOR K=4 TO INPUT N$ 40 NEXT I SOL: Error in line no 40. NEXT K instead of NEXT I 10 FOR J=K TO K(J)=J 30 PRINT K(J) 40 NEXT J SOL: Error in line no 20 in which subscript is out of range (error message occurred) during program running. Chap no 5: SUB-PROGRAM AND FILE HANDLING Question no 1:( in book ques no : 11 ) Write a program to get full name of any person and return the number of characters in his first name. Sol: 20 input plz enter any name: ;N$ 30 T$= A 40 WHILE T$<> 50 C=C+1 60 T$=MID$(N$,C,1) 70 WEND 80 print The no of characters is= ;C-1 90 end plz enter any name: takbeer science The no of characters is=7

12 Question no 2:( in book ques no : 14 ) Write a program that changes temperature in Celsius to Fahrenheit. Use DEF FN statement to define function for the convection formula. Hint : f=9/5*c+32 SYNTAX(DEF FN) 20 DEF FN A(c)=9/5*C input plz enter the temp in Celsius = ;C 40 print The temp in Fahrenheit = ;FN A(c) 50 end plz enter the temp in Celsius =4 The temp in Fahrenheit =39.2 DEF FN name (arguments) expression Chap no 6 GRAPHICS IN BASIC Question no 1:( in book ques no : 9 ) Find out the errors in the following if any? a). LINE (140,100)-( ),2,BF,4 SOL: Symbol (-) that is placed between co ordinates ( ) should be replaced by (,) hence it is (300,100) LINE (140,100)-(300,100), 2, BF, 4 b). 10 screen 2 20 color 1,2 30 draw U10 R10 D10 L10 SOL: color 1,2 PSET (250,50) is used to draw box should be placed in the LINE no.20 instead c) 10 screen 1 20 A=20 30 DRAW U=A R=A,D=A L=A

13 DRAW U20 R20 D20 L20 should be placed in line no 30 instead of DRAW U=A R=A,D=A L=A Question no 2:( in book ques no : 10 ) What will be the output of the following: a) 10 SCREEN 2 20 PSET(250,50) 30 DRAW G50 R100 H50 40 END b) 10 SCREEN 2 20 FOR I=30 TO CIRCLE (1,100), NEXT I

14 Question no 3:( in book ques no : 15 ) Write a program to produce five concentric circles of different radii. Sol: 20 screen 1 30 circle (100,100),10,5 40 circle (100,100),30,4 50 circle (100,100),50,3 60 circle (100,100),70,2 70 circle (100,100),90,1 80 end Question no 4:( in book ques no : 16 ) Write a program to draw a parallelogram by using DRAW statement; 20 SCREEN 2 30 LINE (10,150)-(200,175),1,B 40 PSET (160,100) 50 END GOOD LUCK

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