VOLUME II CHAPTER 9 INTRODUCTION TO C++ HANDS ON PRACTICE PROGRAMS

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1 VOLUME II CHAPTER 9 INTRODUCTION TO C++ HANDS ON PRACTICE PROGRAMS 1. Write C++ programs to interchange the values of two variables. a. Using with third variable int n1, n2, temp; cout<<"enter 1st Number: "; cin>>n1; cout<<"enter 2nd Number: "; cin>>n2; //displaying numbers before swapping cout<<"before Swap"<<n1<<n2; //swapping temp=n1; n1=n2; n2=temp; //displaying numbers after swapping cout<<"\nafter Swap"<<n1<<n2; b. Without using third variable int a,b; cout<<"\nenter two numbers : "; cin>>a>>b; a=a+b; b=a-b; a=a-b; cout<<"\nafter swapping numbers are : "; cout<<a<<"\t"<<b; 2. Write C++ programs to do the following: a. To find the perimeter and area of a quadrant. Page 1

2 int main( ) int r; float area,peri; cout<<"enter radius"; cin>>r; area = 3.14*r*r*; peri = 2*3.14*r; cout<<"area= "<<area; cout<<"\n perimeter = "<<peri; b. To find the area of triangle. int height, base; float area; cout<<"enter height and base : "; cin>>height>>base; area= (0.5)*height*base; cout<<"area of triangle is : "<<area; c. To convert the temperature from Celsius to Fahrenheit. float fahrenheit, celsius; cout << "Enter the temperature in Celsius : "; cin >> celsius; fahrenheit = (celsius * 9.0) / ; cout << "The temperature in Celsius : " << celsius << endl; cout << "The temperature in Fahrenheit : " << fahrenheit << endl; Page 2

3 3. Write a C++ to find the total and percentage of marks you secured from 10th Standard Public Exam. Display all the marks one-by-one along with total and percentage. Apply formatting functions. #include<string.h> int rollno,tam,eng,mat,sci,soc,total; float percentage; char name[20], div[10]; cout << "Input the Roll Number of the student :"; cin >> rollno; cout << "Input the Name of the Student :"; cin >> name; cout << "Input the marks of Tamil, English, Maths, Science, & Social"; cin >>tam>>eng>>mat>>sci>>soc; total=tam+eng+mat+sci+soc; percentage = total/5.0; if (percentage >= 60) strcpy(div,"first"); else if (percentage < 60 && percentage >= 48) strcpy(div,"second"); else if (percentage <48 && percentage >= 36) strcpy(div,"pass"); else strcpy(div, "Fail"); cout << "Roll No : "<< rollno <<endl << "Name of Student : " << name <<endl; cout << "Marks in Tamil : "<<tam<< endl; cout << "Marks in English : "<<eng<< endl; cout << "Marks in Maths : "<<mat<< endl; cout << "Marks in Science : "<<sci<< endl; cout << "Marks in Social Science : "<<soc<< endl; cout << "Total Marks = " << total <<endl; cout << "Percentage = " << percentage <<endl; cout << "Division = " << div <<endl; CHAPTER 10 FLOW OF CONTROL HANDS ON PRACTICE PROGRAMS 1. Temperature conversion program that gives the user the option of converting Fahrenheit to Celsius or Celsius to Fahrenheit and depending upon user's choice. Page 3

4 int a; cout<<"1. For Celsius To Fahrenheit. \n"; cout<<"2. For Fahrenheit To Celsius. \n"; cout<<"3. For Exit\n\n"; cout<<"enter Your Choice \n "; cin>>a; switch(a) double cel,feh; case 1: cout<<"enter The Temperature In Celsius\n"; cin>>cel; feh=(cel*9/5)+32; cout<<"\ntemperature In Fahrenheit Is = "<<feh ; case 2: cout<<"enter The Temperature In Fahrenheit\n"; cin>>feh; cel=(feh-32)*5/9; cout<<"\ntemperature In Celsius Is = "<<cel ; case 3: exit(0); default:cout<<"\nenter The Right Choice \n"; 2. The program requires the user to enter two numbers and an operator. It then carries out the specified arithmetical operation: addition, subtraction, multiplication or division of the two numbers. Finally, it displays the result. int a,b,c; char ch; cout<< Enter the Two Numbers ; cin>>a>>b; cout<< \nenter the Choice ; Page 4

5 cout<< \naddition(+) ; cout<< \nsubtraction(-) ; cout<< \nmultiplication(*) ; cout<< \ndivision(/) ; cin>>ch; switch(ch) case + : c=a+b; cout<< \nthe Addition of two numbers are= <<c; case - : c=a-b; cout<< \nthe Subtraction of two numbers are= <<c; case * : c=a*b; cout<< \nthe Multiplication of two numbers are= <<c; case / : c=a/b; cout<< \nthe Division of two numbers are= <<c; default: cout<< \nyou chose the Wrong Character ; system( pause ); 3. Program to input a character and to print whether a given character is an alphabet, digit or any other character. #include <stdio.h> char ch; cout<< Enter any Character: ; /* Input character from user */ cin>>ch; if((ch >= 'a' && ch <= 'z') (ch >= 'A' && ch <= 'Z')) /* Alphabet check */ cout<<ch<< is alphabet ; else if(ch >= '0' && ch <= '9') cout<<ch<< is digit ; Page 5

6 else cout<<ch<< is special character ; 4. Program to print whether a given character is an uppercase or a lowercase character or a digit or any other character. Use ASCII codes for it. The ASCII codes are as given below: Characters ASCII Range '0' - '9' 'A' - 'Z' 'a' - 'z' other characters excluding the above mentioned codes. char ch; cout<<"enter any character: "; cin>>ch; if(ch>=65&&ch<=90) cout<<endl<<"you entered an uppercase character"; else if(ch>=48&&ch<=57) cout<<endl<<"you entered a digit"; else if(ch>=97&&ch<=122) cout<<endl<<"you entered a lowercase character"; else cout<<endl<<"you entered a special character"; 5. Write a C++ Program to calculate the factorial of an integer. unsigned int n; unsigned long long factorial = 1; cout << "Enter a positive integer: "; cin >> n; Page 6

7 for(int i = 1; i <=n; ++i) factorial *= i; cout << "Factorial of " << n << " = " << factorial; 6. Write a C++ Program that print int i; for(i=1;i<=128;i*=2) cout<<i<<" "; 7. Program to generate divisors of an integer. int i,n; cout<<"enter the value of the integer"; cin>>n; for(i=1;i<=n;i++) if(n%i==0) cout<<i<<endl; 8. Program to print fibonacci series i.e., int n, t1 = 0, t2 = 1, nextterm = 0; cout << "Enter the number of terms: "; cin >> n; Page 7

8 cout << "Fibonacci Series: "; for (int i = 1; i <= n; ++i) // Prints the first two terms. if(i == 1) cout << " " << t1; continue; if(i == 2) cout << t2 << " "; continue; nextterm = t1 + t2; t1 = t2; t2 = nextterm; cout << nextterm << " "; 9. Programs to produces the following design using nested loops a) b) c) A A B # # # # # A B C A B C D A B C D E A B C D E F a) char ch='a'; int n; for(int i=1;i<=6;i++) ch = 'A'; for(int j=1;j<=i;j++) cout<< ch<< " "; ch++; cout<< "\n"; # # # # # # # # # # # Page 8

9 b) for(int i=1;i<=5;i++) for(int j=5;j>=i;j--) cout<<j<<"\t"; cout<<"\n"; c) int n; for(int i=4,sp=0;i>0;i--,sp++) for(int k=0;k<=sp;k++) cout<<" "<<" "; for(int j = 1;j<2*i ;j++) cout<<"#"<<" "; cout<<"\n"; 10. Program to check whether square root of a number is prime or not. int n, i; bool isprime = true; cout << "Enter a positive integer: "; cin >> n; Page 9

10 for(i = 2; i <= n / 2; ++i) if(n % i == 0) isprime = false; if (isprime) cout << "This is a prime number"; else cout << "This is not a prime number"; BOOK BACK PROGRAMS PART II 6. Write a C++ program which contains for loop that displays the number from 21 to 30. #include<stdio.h> for(int i=21;i<=30;i++) cout<<i<< \n ; system( pause ); 7. Write a while loop that displays numbers 2, 4, 6, #include<stdio.h> for(int i=2;i<=20;i+=2) cout<<i<< \n ; system( pause ); Page 10

11 PART III 3. Write a C++ program to print multiplication table of a given number. int n; cout<<"enter the Number To Find Multiplication Table "; cin>>n; for(int i=1;i<=10;i++) cout<<n<<" * "<<i<<" = "<<n*i<<endl; 5. Write a short program to print following series: (a) clrscr(); int i,a=-1,b; for(i=1;i<=40;i+=3) a*=-1; b=i; b*=a; cout<<b<<" "; system( pause ); PART IV 3. Write a program to find the LCM and GDC of two numbers. //Program to find the LCM int n1, n2, max; cout << "Enter two numbers: "; cin >> n1 >> n2; max = (n1 > n2)? n1 : n2; Page 11

12 do if (max % n1 == 0 && max % n2 == 0) cout << "LCM = " << max; else ++max; while (true); //Program to find the GCD int n1, n2; cout << "Enter two numbers: "; cin >> n1 >> n2; while(n1!= n2) if(n1 > n2) n1 -= n2; else n2 -= n1; cout << "GDC = " << n1; 4. Write programs to find the sum of the following series: (a) x- x2/2! + x3/ 3! - x4/4! + x5/5! - x6/6! int x,p,i,j; double fact=1.0,ans=0; cout<<"enter the value of x:"; cin>>x; cout<<"\n Enter till what power you want:"; cin>>p; ans=x; for(i=2,j=1;i<=p;i++,j++) fact=fact*i; Page 12

13 if(i%2==0) ans+=(pow(-1,j))*((pow(x,i))/(fact)); cout<<"\n The sum of the series is:"<<ans; (b) x+x2/2 + x3/ xn/n clrscr(); int i,n; float x,sum=0; cout<< x+x^2/2+x^3/3+..+x^n/n ; cout<< \n Enter value of x and n: ; cin>>x>>n; for(i=1;i<=n;++i) sum+=pow(x,i)/i; cout<< \n sum= <<sum; system( pause ); 5. Write a program to find sum of the series S = 1 + x + x x n clrscr(); long i,n,x,sum=1; cout<< 1+x+x^2+ +x^n ; cout<< \n Enter the value of x and n: ; cin>>x>>n; for(i=1;i<=n;++i) sum+=pow(x,i); cout<< \n Sum= <<sum; system( pause ); CHAPTER 11 FUNCTIONS HANDS ON PRACTICE PROGRAMS Page 13

14 1. Program that reads two strings and appends the first string to the second. For example, if the first string is entered as Tamil and second string as nadu, the program should print Tamilnadu. Use string library header. #include<stdio.h> char s1[ ]= Tamil,s2[ ]= nadu ; strcat(s1,s2); puts(s1); 2. Program that reads a string and converts it to uppercase. Include required header files. #include <ctype.h> using namespace std; char ch; cout<<"enter the Character"; ch=getchar(); cout<<"the Character is changed to Upper Case="<<toupper(ch); 3. Program that checks whether a given character is an alphabet or not. If it is an alphabet, whether it is lowercase character or uppercase character? Include required header files. #include<stdio.h> #include<ctype.h> char ch; int n; cout << "\n Enter a character: "; ch = getchar(); Page 14

15 cout<<"\n The Return Value of isalpha(ch) is :" << isalpha(ch) ; n=islower(ch); if(n==0) cout<< \n The Given Character is in Upper Case ; else cout<< \n The Given Character is in Lower Case ; system( pause ); 4. Program that checks whether the given character is alphanumeric or a digit. Add appropriate header file. #include<stdio.h> #include<ctype.h> char ch; int r; cout<<"\n Type a Character :"; ch = getchar(); r = isalnum(ch); cout<<"\nthe Return Value of isalnum(ch) is :"<<r; 5. Write a function called zero_small ( ) that has two integer arguments being passed by reference and sets smaller of the two numbers to 0. Write the main program to access this funtion. void zero_small(int &,int &); int x,y; cout<<"enter first number : "; cin>>x; cout<<"enter second number : "; cin>>y; zero_small(x,y); cout<<"first number is : "<<x; cout<<"\nsecond number is : "<<y; void zero_small(int &a, int &b) Page 15

16 if(a<b) a=0; else b=0; 7. Program that invokes a function calc ( ) which intakes two integers and an arithmetic operator and prints the corresponding result. void calc(int x, int y) int z; z=x+y; cout<< The Sum of the Two Integers are= <<z; int a,b; cout<< Enter the Two Integers ; cin>>a>>b; calc(a,b); system( pause ); BOOK BACK PROGRAMS PART IV 5. Write a program to accept any integer number and reverse it. int n, reversednumber = 0, remainder; cout << "Enter an integer: "; cin >> n; while(n!= 0) remainder = n%10; reversednumber = reversednumber*10 + remainder; n /= 10; cout << "Reversed Number = " << reversednumber; Page 16

Control Structure and Loop Statements

Control Structure and Loop Statements A C/C++ program executes in sequential order that is the way the instructions are written. There are situations when we have to skip certain code in the program and