for programming

1. 1
1. WAP to print following series:
A A A
A A A
A A A
#include<iostream.h>
#include<conio.h>
int main()
{
int r=1;
while(r<=3)
{
int c=1;
while(c<=3)
{
cout<<"A"<<" ";
c++;
}
cout<<endl;
r++;
}
getch();
}

2. 2
Output:

3. 3
2. WAP to print following series:
5 4 3 2 1
4 3 2 1
3 2 1
2 1
1
#include<iostream.h>
#include<conio.h>
int main()
{
int r=5;
while(r>=1)
{
int c=r;
while(c>=1)
{
cout<<c<<" ";
c--;
}
cout<<endl;

4. 4
r--;
}
getch();
}
Output:

5. 5
3. WAP to print following series:
5 4 3 2 1
5 4 3 2
5 4 3
5 4
5
#include<iostream.h>
#include<conio.h>
int main()
{
int r=1;
while(r<=5)
{
int c=5;
while(c>=r)
{
cout<<c<<" ";
c--;
}
cout<<endl;

6. 6
r++;
}
getch();
}
Output:

7. 7
4. WAP to print following series:
5
5 4
5 4 3
5 4 3 2
5 4 3 2 1
#include<iostream.h>
#include<conio.h>
int main()
{
int r=5;
while(r>=1)
{
int c=5;
while(c>=r)
{
cout<<c<<" ";
c--;
}
cout<<endl;

8. 8
r--;
}
getch();
}
Output:

9. 9
5. WAP to print following series:
1
2 3
4 5 6
7 8 9 10
#include<iostream.h>
#include<conio.h>
int main()
{
int k=1;
int r=1;
while(r<=4)
{
int c=1;
while(c<=r)
{
cout<<k<<" ";
c++;
k++;
}
cout<<endl;

10. 10
r++;
}
getch();
}
Output:

11. 11
6. WAP to print following series:
1
1 2
2 3 4
4 5 6 7
7 8 9 10 11
#include<iostream.h>
#include<conio.h>
int main()
{
int k=1;
int r=1;
while(r<=5)
{
int c=1;
while(c<=r)
{
cout<<k<<" ";
c++;
k++;

12. 12
}
cout<<endl;
r++;
k--;
}
getch();
}
Output:

13. 13
7. WAP to print following series:
1 2 3 4
5 6 7
8 9
10
#include<iostream.h>
#include<conio.h>
int main()
{
int k=1;
int r=4;
while(r>=1)
{
int c=1;
while(c<=r)
{
cout<<k<<" ";
c++;
k++;
}
cout<<endl;

14. 14
r--;
}
getch();
}
Output:

15. 15
8. WAP to print following series:
10
9 8
7 6 5
4 3 2 1
#include<iostream.h>
#include<conio.h>
int main()
{
int k=10;
int r=1;
while(r<=4)
{
int c=1;
while(c<=r)
{
cout<<k<<" ";
c++;
k--;
}
cout<<endl;

16. 16
r++;
}
getch ();
}
Output:

17. 9. WAP to create half diamond of the number which enters by user.
17
#include<iostream.h>
#include<conio.h>
int main()
{
int n;
cout<<"enter any number for create a half diamond";
cin>>n;
int r=1;
while(r<=n)
{
int k=n-1;
while(k>=r)
{
cout<<" ";
k--;
}
int c=1;
while(c<=r)
{
cout<<c;

18. 18
c++;
}
int m=r-1;
while(m>=1)
{
cout<<m;
m--;
}
cout<<endl;
r++;
}
getch();
}

19. 19
Output:

20. 10. WAP to create a diamond of a number which enter by user.
20
#include<iostream.h>
#include<conio.h>
int main()
{
int n;
cout<<"enter any number for create a diamond";
cin>>n;
int r=1;
while(r<=n)
{
int k=n-1;
while(k>=r)
{
cout<<" ";
k--;
}
int c=1;
while(c<=r)
{
cout<<c;

21. 21
c++;
}
int m=r-1;
while(m>=1)
{
cout<<m;
m--;
}
cout<<endl;
r++;
}
int r1=n-1;
while(r1>=1)
{
int k=n-1;
while(k>=r1)
{
cout<<" ";
k--;
}
int c=1;

22. 22
while(c<=r1)
{
cout<<c;
c++;
}
int m=r1-1;
while(m>=1)
{
cout<<m;
m--;
}
cout<<endl;
r1--;
}
getch();
}

23. 23
Output:

24. 11. WAP to print Armstrong numbers out of 1000 numbers.
24
#include<iostream.h>
#include<conio.h>
int main()
{
int n;
for(n=1;n<=1000;n++)
{
int temp,d,arm=0;
temp=n;
while(temp>0)
{
d=temp%10;
temp=temp/10;
arm=arm+(d*d*d);
}
if(arm==n)
{
cout<<n;
cout<<endl;
}

25. 25
}
getch();
}
Output:

26. 12. WAP to find factorial of given number.
26
# include<iostream.h>
#include<conio.h>
int main()
{
int n,i,fact=1;
cout<<"Enter number";
cin>>n;
for(i=1;i<=n;i++)
{
fact=fact*i;
}
cout<<"factorial="<<fact;
getch();
}

27. 27
Output:

28. 13. WAP to print prime numbers out of 100 numbers.
28
#include<iostream.h>
#include<conio.h>
int main()
{
int j,i;
cout<<"The prime numbers are:"<<endl;
for (i=2; i<=100; i++)
for (j=2; j<=i; j++)
{
if(i%j == 0)
break;
else
{
cout<<i<<" ";
break;
}
}
getch();
}

29. 29
Output:

30. 14. WAP to print Fibonacci series of given number.
30
#include<iostream.h>
#include<conio.h>
int main()
{
int x,y,z,n;
x=0;y=1;
cout<<"nEnter value of n:";
cin>>n;
cout<<"nFibonacci Series:nn";
cout<< x<<" ";
cout<< y<<" ";
for( int i=0; i<n-2; i++)
{
z = x+y;
cout<< z<<" ";
x = y;
y = z;
}
getch();
}

31. 31
Output:

32. 15. WAP to print the table of a given number.
32
#include<iostream.h>
#include<conio.h>
int main()
{
int n;
cout<<"enter any number to print the table";
cin>>n;
for(int i=1;i<=10;i++)
{
int m=n*i;
cout<<n<<" "<<"*"<<" "<<i<<" "<<"="<<" "<<m<<endl;
}
getch();
}

33. 33
Output:

34. 16. WAP to find out given number is even using if statement.
34
#include<iostream.h>
#include<conio.h>
int main()
{
int n;
cout<<"enter any number";
cin>>n;
if(n%2==0)
{
cout<<"Number is even";
}
getch();
}

35. 35
Output:

36. 17. WAP to find out given number is even or odd using if else statement.
36
#include<iostream.h>
#include<conio.h>
int main()
{
int n;
cout<<"enter any number";
cin>>n;
if(n%2==0)
{
cout<<"Number is even";
}
else
{
cout<<"Number is odd";
}
getch();
}

37. 37
Output:

38. 18. WAP to find out a largest number among three number using multiple if
statement.
38
#include<iostream.h>
#include<conio.h>
main()
{
int a,b,c;
cout<<"enter three no.'s ";
cin>>a>>b>>c;
if (a>b && a>c)
{
cout<<"largest number is "<<a;
}
if(b>a && b>c)
{
cout<<"largest number is "<<b;
}
if(c>a && c>b)
{
cout<<"largest number is "<<c;
}

39. 39
getch();
}
Output:

40. 19. WAP to find out a largest number among three number using nested if
statement.
40
#include<iostream.h>
#include<conio.h>
int main()
{
int a,b,c;
cout<<"enter three numbers";
cin>>a>>b>>c;
if(a>b)
{
if(a>c)
{
cout<<"greater number is "<<a;
}
else
{
cout<<"greater number is "<<c;
}
}
if(b>a)

41. 41
{
if(b>c)
{
cout<<"greater number is "<<b;
}
else
{
cout<<"greater number is "<<c;
}
}
getch();
}

42. 42
Output:

43. 20. WAP to find out a largest number among three number using if else if
statement.
43
#include<iostream.h>
#include<conio.h>
main()
{
int a,b,c;
cout<<"enter three no.'s ";
cin>>a>>b>>c;
if (a>b && a>c)
{
cout<<"largest number is "<<a;
}
else if(b>a && b>c)
{
cout<<"largest number is "<<b;
}
else
{
cout<<"largest number is "<<c;
}

44. 44
getch();
}
Output:

45. 21. WAP to illustrate the use of switch statement.
45
#include<iostream.h>
#include<conio.h>
int main()
{
int day;
cout<<"enter the number of day";
cin>>day;
switch(day)
{
case 0:
cout<<"Sunday";
break;
case 1:
cout<<"Monday";
break;
case 2:
cout<<"Tuesday";
break;
case 3:
cout<<"Wednesday";

46. 46
break;
case 4:
cout<<"Thursday";
break;
case 5:
cout<<"Friday";
break;
case 6:
cout<<"Saturday";
break;
default:
cout<<"Invalid choice try again";
break;
}
getch();
}

47. 47
Output:

48. 22. WAP to find largest number out of 3 numbers using function without
argument and without return value.
48
#include<iostream.h>
#include<conio.h>
int main()
{
void largest(void);
largest();
getch();
}
void largest()
{
int x,y,z;
cout<<"enter three numbers:";
cin>>x>>y>>z;
if(x>y && x>z)
cout<<"largest number is "<<x;
else if(y>x && y>z)
cout<<"largest number is "<<y;
else
cout<<"largest number is "<<z;

49. 49
}
Output:

50. 23. WAP to find largest number out of 3 numbers using function with
argument and without return value.
50
#include<iostream.h>
#include<conio.h>
int main()
{
void largest(int,int,int);
int a,b,c;
cout<<"enter three numbers:";
cin>>a>>b>>c;
largest(a,b,c);
getch();
}
void largest(int x,int y,int z)
{
if(x>y && x>z)
cout<<"largest number is "<<x;
else if(y>x && y>z)
cout<<"largest number is "<<y;
else
cout<<"largest number is "<<z;

51. 51
}
Output:

52. 24. WAP to find largest number out of 3 numbers using function with
argument and with return value.
52
#include<iostream.h>
#include<conio.h>
int main()
{
int largest(int,int,int);
int a,b,c;
cout<<"enter three numbers:";
cin>>a>>b>>c;
int l=largest(a,b,c);
cout<<"largest number is "<<l;
getch();
}
int largest(int x,int y,int z)
{
if(x>y && x>z)
return(x);
else if(y>x && y>z)
return(y);
else

53. 53
return(z);
}
Output:

54. 25. WAP to enter the data of five students which include roll number of
student and marks in five subjects.
54
#include<iostream.h>
#include<conio.h>
class student
{
int rollno,m[5];
public:
void input();
void output();
};
void student::input()
{
cout<<"enter rollno";
cin>>rollno;
for(int i=0;i<=4;i++)
{
cout<<"enter marks for subject"<<i+1<<" ";
cin>>m[i];
}
}

55. 55
void student::output()
{
int p;
cout<<"rollno="<<rollno;
cout<<endl;
for(int i=0;i<=4;i++)
{
cout<<"marks of"<<i+1<<"subject"<<m[i];
cout<<endl;
}
}
int main()
{
student s[5];
for(int i=0;i<=4;i++)
{
cout<<"enter the data for student no"<<i+1<<endl;
s[i].input();
}
for(int i=0;i<=4;i++)
{

56. 56
cout<<endl;
cout<<"showing data for student no"<<i+1<<endl;
s[i].output();
}
getch();
}
Output:

57. 26. WAP using function definition inside the class.
57
#include<iostream.h>
#include<conio.h>
class student
{
private:
int rollno;
char name[20];
char add[50];
public:
void getdata()
{
cout<<"enter Roll number, name and add:"<<endl;
cin>>rollno;
cin>>name;
cin>>add;
}
void putdata()
{
cout<<rollno<<" ";
cout<<name<<" ";

58. 58
cout<<add<<" ";
}
};
int main()
{
student o1[5];
for(int i=0;i<5;i++)
{
o1[i].getdata();
}
cout<<"Rollno"<<"t"<<"Name"<<"t"<<"Address"<<"t"<<endl;
for(int i=0;i<5;i++)
{
o1[i].putdata();
cout<<endl;
}
getch();
}

59. 59
Output:

60. 27. WAP using function definition outside the class.
60
#include<iostream.h>
#include<conio.h>
class student
{
int rollno;
char name[20];
char add[50];
public:
void getdata();
void putdata();
};
void student :: getdata()
{
cout<<"enter Roll number,name and add:"<<endl;
cin>>rollno;
cin>>name;
cin>>add;
}
void student :: putdata()
{

61. 61
cout<<rollno<<" ";
cout<<name<<" ";
cout<<add<<" ";
}
int main()
{
student o1[5];
for(int i=0;i<5;i++)
{
o1[i].getdata();
}
cout<<"Rollno"<<"t"<<"Name"<<"t"<<"Address"<<"t"<<endl;
for(int i=0;i<5;i++)
{
o1[i].putdata();
cout<<endl;
}
getch();
}

62. 62
Output:

63. 28. WAP to illustrate the use of array of object and array within the class.
63
#include<iostream.h>
#include<conio.h>
class student
{
int rollno,m[5]; //array within class
public:
void input();
void output();
};
void student::input()
{
cout<<"enter rollno";
cin>>rollno;
for(int i=0;i<=4;i++)
{
cout<<"enter marks for subject"<<i+1<<" ";
cin>>m[i];
}
}
void student::output()

64. 64
{
int p;
cout<<"rollno="<<rollno;
cout<<endl;
for(int i=0;i<=4;i++)
{
cout<<"marks of"<<i+1<<"subject"<<m[i];
cout<<endl;
}
}
int main()
{
student s[5]; //array of object
for(int i=0;i<=4;i++)
{
cout<<"enter the data for student no"<<i+1<<endl;
s[i].input();
}
for(int i=0;i<=4;i++)
{
cout<<endl;

65. cout<<"showing data for student no"<<i+1<<endl;
65
s[i].output();
}
getch();
}
Output:

66. 29. WAP to print the total of diagonal of a matrix.
66
#include<iostream.h>
#include<conio.h>
int main()
{
int a[3][3], i, j,sum=0;
cout<<"nEnter elements of Array A:n";
for (i=0; i<3; i++)
{
for (j=0; j<3; j++)
{
cin>>a[i][j];
}
}
printf("nElements of Matrix A:n");
for (i=0; i<3; i++)
{
for (j=0; j<3; j++)
{
cout<<a[i][j]<<"t";
}

67. 67
cout<<endl;
}
for (i=0; i<3; i++)
{
for (j=0; j<3; j++)
{
if(i==j)
sum=sum+a[i][j];
}
}
cout<<"nMatrix diagnal Addition is:n"<<sum;
getch();
}

68. 68
Output:

69. 69
30. WAP to addition of two matrices.
#include<iostream.h>
#include<conio.h>
int main()
{
int a[3][3], b[3][3], c[3][3], i, j;
cout<<"nEnter elements of Array A:n";
for (i=0; i<3; i++)
{
for (j=0; j<3; j++)
{
cin>>a[i][j];
}
}
cout<<"nEnter elements of Array B:n";
for (i=0; i<3; i++)
{
for (j=0; j<3; j++)
{
cin>>b[i][j];

70. 70
}
}
for (i=0; i<3; i++)
{
for (j=0; j<3; j++)
{
c[i][j] = a[i][j] + b[i][j];
}
}
printf("nElements of Matrix A:n");
for (i=0; i<3; i++)
{
for (j=0; j<3; j++)
{
cout<<a[i][j]<<"t";
}
cout<<endl;
}
printf("nElements of Matrix b:n");
for (i=0; i<3; i++)
{

71. 71
for (j=0; j<3; j++)
{
cout<<b[i][j]<<"t";
}
cout<<endl;
}
cout<<"nMatrix Addition is:n";
for (i=0; i<3; i++)
{
for (j=0; j<3; j++)
{
cout<<c[i][j]<<"t";;
}
cout<<endl;
}
getch();
}

72. 72
Output:

73. 31. WAP to illustrate the use of single inheritance.
73
#include<iostream.h>
#include<conio.h>
class a
{
private:
void f1()
{
cout<<"I am f1"<<endl;
}
public:
void f2()
{
cout<<"I am f2"<<endl;
}
};
class b:public a
{
private:
void f3()
{

74. 74
cout<<"I am f3"<<endl;
}
public:
void f4()
{
cout<<"I am f4"<<endl;
}
};
int main()
{
b o1;
o1.f2();
o1.f4();
getch();
}

75. 75
Output:

76. 32. WAP to illustrate the use of multiple inheritances.
76
#include<iostream.h>
#include<conio.h>
class a
{
private:
void f1()
{
cout<<"I am f1"<<endl;
}
public:
void f2()
{
cout<<"I am f2"<<endl;
}
};
class b
{
private:
void f3()
{

77. 77
cout<<"I am f3"<<endl;
}
public:
void f4()
{
cout<<"I am f4"<<endl;
}
};
class c:public a,public b
{
private:
void f5()
{
cout<<"I am f5"<<endl;
}
public:
void f6()
{
cout<<"I am f6"<<endl;
}
};

78. 78
int main()
{
c o1;
o1.f2();
o1.f4();
o1.f6();
getch();
}
Output:

79. 33. WAP to illustrate the use of multilevel inheritance.
79
#include<iostream.h>
#include<conio.h>
class a
{
private:
void f1()
{
cout<<"I am f1"<<endl;
}
public:
void f2()
{
cout<<"I am f2"<<endl;
}
};
class b:public a
{
private:
void f3()
{

80. 80
cout<<"I am f3"<<endl;
}
public:
void f4()
{
cout<<"I am f4"<<endl;
}
};
class c:public b
{
private:
void f5()
{
cout<<"I am f5"<<endl;
}
public:
void f6()
{
cout<<"I am f6"<<endl;
}
};

81. 81
int main()
{
b o1;
c o2;
o1.f2();
o1.f4();
o2.f6();
getch();
}
Output:

82. 34. WAP to illustrate the use of hierarchical inheritance.
82
#include<iostream.h>
#include<conio.h>
class a
{
private:
void f1()
{
cout<<"I am f1"<<endl;
}
public:
void f2()
{
cout<<" I am f2"<<endl;
}
};
class b:public a
{
private:
void f3()
{

83. 83
cout<<" I am f3"<<endl;
}
public:
void f4()
{
cout<<" I am f4"<<endl;
}
};
class c:public a
{
private:
void f5()
{
cout<<" I am f5";
}
public:
void f6()
{
cout<<" I am f6";
}
};

84. 84
int main()
{
b o1;
c o2;
o1.f2();
o1.f4();
o2.f2();
o2.f6();
getch();
}
Output:

85. 35. WAP to illustrate the use of hybrid inheritance.
85
#include<iostream.h>
#include<conio.h>
class a
{
private:
void f1()
{
cout<<"I am f1"<<endl;
}
public:
void f2()
{
cout<<"I am f2"<<endl;
}
};
class b:virtual public a
{
private:
void f3()
{

86. 86
cout<<"I am f3"<<endl;
}
public:
void f4()
{
cout<<"I am f4"<<endl;
}
};
class c:virtual public a
{
private:
void f5()
{
cout<<"I am f5"<<endl;
}
public:
void f6()
{
cout<<"I am f6"<<endl;
}
};

87. 87
class d:public b,public c
{
private:
void f7()
{
cout<<"I am f7"<<endl;
}
public:
void f8()
{
cout<<"I am f8"<<endl;
}
};
int main()
{
d o1;
o1.f2();
o1.f4();
o1.f2();
o1.f6();
o1.f8();

88. 88
getch();
}
Output:

89. 36. WAP to demonstrate the use of parameterized constructor and default
constructor.
89
#include<iostream.h>
#include<conio.h>
class integer
{
int m,n;
public:
integer() //Default constructor
{
m=0;
n=0;
}
integer(int x,int y) //Parameterized constructor
{
m=x;
n=y;
}
void display(void)
{
cout<<"value1="<<m<<endl;

90. 90
cout<<"value2="<<n<<endl;
}
};
int main()
{
integer o1,o2(10,20);
cout<<"Default constructor:"<<endl;
o1.display();
cout<<"Parameterized constructor:"<<endl;
o2.display();
getch();
}
Output:

91. 37. WAP to demonstrate the use of destructor.
91
#include<iostream.h>
#include<conio.h>
int count=0;
class alpha
{
public:
alpha()
{
count++;
cout<<"number of object created"<<count<<endl;
}
~alpha()
{
cout<<"number of object destroyed"<<count<<endl;
count--;
}
};
int main()
{
cout<<"enter main:"<<endl;

92. 92
{
alpha a1,a2,a3,a4;
{
cout<<"enter block1:"<<endl;
alpha a5;
}
{
cout<<"enter block2:"<<endl;
alpha a6;
}
cout<<"re-enter in main:"<<endl;
}
getch();
}

93. 93
Output:

94. 38. WAP to illustrate the use of copy constructor.
94
#include<iostream.h>
#include<conio.h>
class code
{
int id;
public:
code()
{
}
code(int a)
{
id=a;
}
code(code &i)
{
id=i.id;
}
void display(void)
{
cout<<"id="<<id<<endl;

95. 95
}
};
int main()
{
code a(100);
code b=a;
code c(a);
code d;
d=a;
a.display();
b.display();
c.display();
d.display();
getch();
}

96. 96
Output:

97. 39. WAP to illustrate the use of function overloading.
97
#include<iostream.h>
#include<conio.h>
int operate(int a,int b)
{
return(a*b);
}
float operate(float a, float b)
{
return(a/b);
}
int main()
{
int x=10,y=20;
float m=2.9,n=1.2;
cout<<"multiply=="<<operate(x,y)<<endl;
cout<<"devision=="<<operate(m,n);
getch();
}

98. 98
Output:

99. 40. WAP to illustrate the use of unary operator overloading.
99
#include<iostream.h>
#include<conio.h>
class single
{
int a,b;
public:
single()
{
a=0;
b=0;
}
single(int x,int y)
{
a=x;
b=y;
}
void display()
{
cout<<"A="<<a<<endl;

100. 100
cout<<"B="<<b<<endl;
}
single operator-()
{
a=-a;
b=-b;
}
};
int main()
{
single o1;
single o2(10,20);
-o1;
-o2;
o1.display();
o2.display();
getch();
}

101. 101
Output:

102. 41. WAP to illustrate the use of binary operator overloading.
102
#include<iostream.h>
#include<conio.h>
class abc
{
int a,b;
public:
abc()
{
a=0;
b=0;
}
abc(int x,int y)
{
a=x;
b=y;
}
void display()
{
cout<<"a="<<a;
cout<<"tb="<<b<<endl;

103. 103
}
abc operator +(abc &n)
{
abc temp;
temp.a=a+n.a;
temp.b=b+n.b;
return(temp);
}
abc operator *(abc &n)
{
abc temp;
temp.a= a * n.a;
temp.b= b * n.b;
return(temp);
}
abc operator /(abc &n)
{
abc temp;
temp.a= a / n.a;
temp.b= b / n.b;
return(temp);

104. 104
}
};
int main()
{
abc a1(30,40);
abc a2(10,20);
abc a3,a4,a5;
a3=a1+a2;
a4=a1*a2;
a5=a1/a2;
a1.display();
a2.display();
cout<<"ADDTION"<<endl;
a3.display();
cout<<"SUBTRACTION"<<endl;
a4.display();
cout<<"DEVISION"<<endl;
a5.display();
getch();
}

105. 105
Output:

106. 42. WAP to illustrate the use of friend function.
106
#include<iostream.h>
#include<conio.h>
class Point
{
int m_i;
friend void ChangePrivate( Point & );
public:
Point( void )
{
m_i=0;
}
void PrintPrivate( void )
{
cout << m_i << endl;
}
};
void ChangePrivate ( Point &i )
{
i.m_i++;
}

107. 107
int main()
{
Point sPoint;
sPoint.PrintPrivate();
ChangePrivate(sPoint);
sPoint.PrintPrivate();
getch();
}
Output:

108. 43. WAP to illustrate the use of virtual function.
108
#include<iostream.h>
#include<conio.h>
class b
{
public:
void virtual show()
{
cout<<"i belong to base class";
}
};
class d:public b
{
public:
void show()
{
cout<<"i belong to derived class";
}
};
int main()
{

109. 109
b *b1;
d d1;
b1=&d1;
b1->show();
getch();
}
Output:

110. 44. WAP to illustrate the use of inline function.
110
#include<iostream.h>
#include<conio.h>
class abc
{
public:
inline void show()
{
cout<<"Hello"<<endl;
}
};
int main()
{
abc obj[3];
for(int i=0;i<3;i++)
{
obj[i].show();
}
getch();
}

111. 111
Output:

112. 45. WAP to illustrate the use of static data member and static member
function.
112
#include<iostream.h>
#include<conio.h>
class test
{
int code;
static int count;
public:
void setcode()
{
code=++count;
}
void showcode()
{
cout<<"object number:"<<code<<"n";
}
static void showcount()
{
cout<<"count:"<<count<<endl;
}

113. 113
};
int test::count;
int main()
{
test t1,t2;
t1.setcode();
t2.setcode();
test::showcount();
test t3;
t3.setcode();
test::showcount();
t1.showcode();
t2.showcode();
t3.showcode();
getch();
}

114. 114
Output:

115. 115
46. WAP to write in a text file.
#include<fstream.h>
#include<iostream.h>
int main()
{
ofstream fout;
fout.open("out.txt");
char str[300]="Time is a great teacher but unfortunately it kills all its pupils. Berlioz";
fout<<str;
fout.close();
return 0;
}
Output:

116. 47. WAP to read from text files and display it.
116
#include<fstream.h>
#include<iostream.h>
#include<conio.h>
int main()
{
ifstream fin;
fin.open("out.txt");
char ch;
while(!fin.eof())
{
fin.get(ch);
cout<<ch;
}
fin.close();
getch();
}

117. 117
Output:

118. 48. WAP to count number of character in text file.
118
#include<fstream.h>
#include<iostream.h>
#include<conio.h>
int main()
{
ifstream fin;
fin.open("out.txt");
char ch;
int count=0;
while(!fin.eof())
{
fin.get(ch);
count++;
}
cout<<"Number of characters in file is "<<count;
fin.close();
getch();
return 0;

119. 119
}
Output:

120. 49. WAP to count number of words in text file.
120
#include<fstream.h>
#include<iostream.h>
#include<conio.h>
int main()
{
ifstream fin;
fin.open("out.txt");
char word[30]; int count=0;
while(!fin.eof())
{
fin>>word;
count++;
}
cout<<"Number of words in file is "<<count;
fin.close();
getch();
return 0;
}

121. 121
Output:

122. 50. WAP to count number of lines in text file.
122
#include<fstream.h>
#include<iostream.h>
#include<conio.h>
int main()
{
ifstream fin;
fin.open("out.txt");
char str[80]; int count=0;
while(!fin.eof())
{
fin.getline(str,80);
count++;
}
cout<<"Number of lines in file is "<<count;
fin.close();
getch();
return 0;
}

123. 123
Output:

124. 51. WAP to copy contents of one file to another file.
124
#include<fstream.h>
int main()
{
ifstream fin;
fin.open("out.txt");
ofstream fout;
fout.open("sample.txt");
char ch;
while(!fin.eof())
{
fin.get(ch);
fout<<ch;
}
fin.close();
return 0;
}

125. 125
Output: