Write a program to input marks of students of 6 subjects & display avg. of best four
Solution:-
import java.io.*;
public class nine
{
public static void main()throws IOException
{
BufferedReader d=new BufferedReader(new InputStreamReader(System.in));
int sub[]=new int[6];
for(int i=0;i<6;i++)
{
System.out.println("Enter value of array sub:- ");
sub[i]=Integer.parseInt(d.readLine());
}
int temp, tot=0;
for(int i=0;i<6;i++)
{
for(int j=0;j<6-i-1;j++)
{
if(sub[j]<sub[j+1])
{
temp=sub[j];
sub[j]=sub[j+1];
sub[j+1]=temp;
}
}
}
for(int i=0;i<4;i++)
{
tot=tot+sub[i];
}
System.out.println("Average of Best Four Subject := " + (tot/4));
}
}
Output
Enter Value of array sub:-
78
Enter Value of array sub:-
67
Enter Value of array sub:-
98
Enter Value of array sub:-
87
Enter Value of array sub:-
99
Enter Value of array sub:-
100
Average of Best Four Subject := 96
Variable Description
Variable
|
Type
|
Purpose
|
sub[]
|
Integer array
|
Storing Six subject’s marks
|
tot
|
Integer
|
For use of sum of best four subject
|
i
|
Integer
|
Counter Varable
|
J
|
Integer
|
Counter Varable
|
temp
|
Integer
|
For use of swaping values
|
:- Write a program to merge array a & array b in array c.
Solution:-
import java.io.*;
public class eleven
{
public static void main()throws IOException
{
BufferedReader d=new BufferedReader(new InputStreamReader(System.in));
int a[]=new int[5];
int b[]=new int[5];
int c[]=new int[10];
//Inputing values for array a and b
for(int i=0;i<5;i++)
{
System.out.println("Enter Value of array a:-");
a[i]=Integer.parseInt(d.readLine());
}
for(int i=0;i<5;i++)
{
System.out.println("Enter Value of array b:-");
b[i]=Integer.parseInt(d.readLine());
}
//Merging value in array c
int x=0;
for(int i=0;i<5;i++)
{
c[x]=a[i];
x++;
}
for(int i=0;i<5;i++)
{
c[x]=b[i];
x++;
}
System.out.println("Merged Array");
for(int i=0;i<10;i++)
{
System.out.print(c[i]);
}
}
}
Output
Enter Value of array a:-
2
Enter Value of array a:-
3
Enter Value of array a:-
4
Enter Value of array a:-
5
Enter Value of array a:-
6
Enter Value of array b:-
7
Enter Value of array b:-
3
Enter Value of array b:-
2
Enter Value of array b:-
3
Enter Value of array b:-
4
Merged Array
2345673234
Variable Description
Variable
|
Type
|
Purpose
|
a[]
|
Integer array
|
Storing five elements in array
|
b[]
|
Integer array
|
Storing five elements in array
|
c[]
|
Integer array
|
Storing 10 elements after merging array a and b
|
i
|
Integer
|
Counter Variable
|
j
|
Integer
|
Counter Variable
|
x
|
Integer
|
Counter Variable
|
Write a program to find common elements of 2 array of integer
Solution:-
import java.io.*;
public class twele
{
public static void main()throws IOException
{
BufferedReader d=new BufferedReader(new InputStreamReader(System.in));
int a[]=new int[5];
int b[]=new int[5];
//Inputing values for array a and b
for(int i=0;i<5;i++)
{
System.out.println("Enter Value of array a:-");
a[i]=Integer.parseInt(d.readLine());
}
for(int i=0;i<5;i++)
{
System.out.println("Enter Value of array b:-");
b[i]=Integer.parseInt(d.readLine());
}
for(int i=0;i<5;i++)
{
for(int j=0;j<5;j++)
{
if(a[i]==b[j])
{
System.out.println("Common Element is :- " + a[i]+"\t Array a : " +i+ "\t Array b : "+j);
}
}
}
}
}
Output
Enter Value of array a:-
2
Enter Value of array a:-
3
Enter Value of array a:-
4
Enter Value of array a:-
5
Enter Value of array a:-
6
Enter Value of array b:-
4
Enter Value of array b:-
3
Enter Value of array b:-
5
Enter Value of array b:-
1
Enter Value of array b:-
6
Common Element is :- 3 Array a : 1 Array b : 1
Common Element is :- 4 Array a : 2 Array b : 0
Common Element is :- 5 Array a : 3 Array b : 2
Common Element is :- 6 Array a : 4 Array b : 4
Variable Description
Variable
|
Type
|
Purpose
|
a[]
|
Integer array
|
Storing five elements in array
|
b[]
|
Integer array
|
Storing five elements in array
|
i
|
Integer
|
Counter Variable
|
j
|
Integer
|
Counter Variable
|
Write a program to store the given city names in a single dimension array. Sort these names in alphabetical order.
Input : Delhi, Bangalore, Agra, Mumbai, Calcutta
Output : Agra, Bangalore, Calcutta, delhi, Mumbai
Solution:-
import java.io.*;
public class eight
{
public static void main()throws IOException
{
BufferedReader d=new BufferedReader(new InputStreamReader(System.in));
String a[]={"Delhi","Bangalore","Agra","Mumbai","Calcutta"};
String t=new String();
for(int i=0;i<5;i++)
{
for(int j=i;j<5;j++)
{
if(a[i].compareTo(a[j])>0)
{
t=a[i];
a[i]=a[j];
a[j]=t;
}
}
}
for(int i=0;i<5;i++)
{
System.out.print(a[i]+" , ");
}
}
}
Output
Agra, Bangalore, Calcutta, delhi, Mumbai
Variable Description
Variable
|
Type
|
Purpose
|
a[]
|
String object array
|
Storing five city names
|
t
|
String object
|
For use of swaping values
|
i
|
Integer
|
Counter Varable
|
J
|
Integer
|
Counter Varable
|
wap to check a no. is Armstrong or not.
Solution:-
import java.io.*;
public class fourteen
{
public static void main()throws IOException
{
BufferedReader d=new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter the value of n:-");
int n=Integer.parseInt(d.readLine());
int m=n,s=0,r;
while(m>0)
{
r=m%10;
s=s+(r*r*r);
m=m/10;
}
if(n==s)
System.out.println("Number is Armstrong Number");
else
System.out.println("Number is not Armstrong Number");
}
}
Output
Enter the value of n:-
153
Number is Armstrong Number
Variable Description
Variable
|
Type
|
Purpose
|
n
|
Integer
|
Storing number for checking
|
m
|
Integer
|
Duplicate copy of n
|
s
|
Integer
|
For doing the sum of digit’s cube
|
r
|
Integer
|
For storing the digit of number
|
wap to accept the age of n employees & count the numbers of persons in the following age group
(i) 26 – 35 (ii) 36 – 45 (iii) 46 – 55
Solution:-
import java.io.*;
public class thirteen
{
public static void main()throws IOException
{
BufferedReader d=new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter the value of n:-");
int n=Integer.parseInt(d.readLine());
int age,a=0,b=0,c=0;
for(int i=1;i<=n;i++)
{
System.out.println("Enter the age of a person:-");
age=Integer.parseInt(d.readLine());
if(age>=26&&age<=35)
a++;
if(age>=36&&age<=45)
b++;
if(age>=46&&age<=55)
c++;
}
System.out.println("Age Group 26- 35 :- "+a);
System.out.println("Age Group 36- 45 :- "+b);
System.out.println("Age Group 46- 55 :- "+c);
}
}
Output
Enter the value of n:-
6
Enter the age of a person:-
36
Enter the age of a person:-
54
Enter the age of a person:-
27
Enter the age of a person:-
52
Enter the age of a person:-
38
Enter the age of a person:-
29
Age Group 26- 35 :- 2
Age Group 36- 45 :- 2
Age Group 46- 55 :- 2
Variable Description
Variable
|
Type
|
Purpose
|
i
|
Integer
|
Counter Variable
|
age
|
Integer
|
For storing age of a person
|
n
|
Integer
|
Number of person
|
a
|
Integer
|
For counting no. of person
|
b
|
Integer
|
For counting no. of person
|
c
|
Integer
|
For counting no. of person
|
Write a program to display the following
*
***
*****
***
*
public class tweleb
{
public void main()
{
for(int i=1;i<=5;i=i+2)
{
for(int j=1;j<=i;j++)
System.out.print("*");
System.out.println();
}
for(int i=3;i>=1;i=i-2)
{
for(int j=1;j<=i;j++)
System.out.print("*");
System.out.println();
}
}
}
Output
*
***
*****
***
*
Variable Description
Variable
|
Type
|
Purpose
|
i
|
Integer
|
Counter Variable
|
j
|
Integer
|
Counter Variable
|
Write a program to display the following
56789
6789
789
89
9
Solution:-
public class twele
{
public void main()
{
for(int i=5;i<10;i++)
{
for(int j=i;j<10;j++)
System.out.print(j);
System.out.println();
}
}
}
Output
56789
6789
789
89
9
Variable Description
Variable
|
Type
|
Purpose
|
i
|
Integer
|
Counter Variable
|
j
|
Integer
|
Counter Variable
|
//x – x3/3! + x5/5! – x7/7! ……………………xn/n!
Solution:-
public class seven
{
public void main(int n,int x)
{
double sum=0;
int f;
double p;
int sign=1;
for(int i=1;i<=n;i=i+2)
{
p=Math.pow(x,i);
f=fact(i);
sum=sum+(p/f)*sign;
sign=sign*-1;
}
System.out.println("Sum is :- " + sum);
}
public int fact(int a)
{
int x=1;
for(int i=1;i<=a;i++)
x=x*i;
return x;
}}
Output
n=5
x=2
Sum is :- 0.9333333333333333
Variable Description
Variable
|
Type
|
Purpose
|
n
|
Integer
|
Storing number of terms in series
|
x
|
Integer
|
Storing value of x in series
|
i
|
Integer
|
Counter Variable
|
f
|
Integer
|
Storing factorial of given integer
|
sum
|
double
|
Storing result
|
p
|
double
|
Storing power of given number
|
a
|
integer
|
Passing argument in function fact()
|
x
|
integer
|
Returning value from function fact()
|
