Rational Numbers Implementation in Java

CODE:

import java.io.*;

import java.util.*;

public class rat

{

/*

*members Numerator,Denominator

*/

int numerator;

int denominator;

/*

*Constructor

*/

public rat(int a,int b)

{

numerator=a;

denominator=b;

}

/*

*Additon method

*@param two rational numbers

*@return sum

*/

public void add(rat a,rat b)

{

if(a.denominator==b.denominator)

{

numerator=a.numerator+b.numerator;

denominator=a.denominator;

}

else

{

numerator=((a.numerator*b.denominator)+(b.numerator*a.denominator));

denominator=(a.denominator*b.denominator);

}

}

/*

*Subtraction method

*@param two rational numbers

*@return difference

*/

public void sub(rat a,rat b)

{

if(a.denominator==b.denominator)

{

numerator=a.numerator-b.numerator;

denominator=a.denominator;

}

else

{

numerator=((a.numerator*b.denominator)-(b.numerator*a.denominator));

denominator=(a.denominator*b.denominator);

}

}

/*

*Multiplication method

*@param two rational numbers

*@return multiple

*/

public void mul(rat a,rat b)

{

numerator=a.numerator*b.numerator;

denominator=a.denominator*b.denominator;

}

/*

*Division method

*@param two rational numbers

*@return quotient

*/

public void div(rat a,rat b)

{

int temp;

temp=b.denominator;

b.denominator=b.numerator;

b.numerator=temp;

numerator=a.numerator*b.numerator;

denominator=a.denominator*b.denominator;

}

/*

*Simplification method

*@param one rational numbers

*@return simplified sum

*/

public void simplify()

{

for(int i=1;i<=10;i++)

if((numerator%i==0)&&(denominator%i==0))

{

numerator/=i;

denominator/=i;

}

}

}

/*

*Main class

*/

class rational

{

/*

*Main function

*@param nothing

*@return nothing :P

*/

public static void main(String args[])

{

Scanner s=new Scanner(System.in);

System.out.println("enter the first rational number");

int n=s.nextInt();

int d=s.nextInt();

rat r1=new rat(n,d);

System.out.println("enter the second rational number");

int n1=s.nextInt();

int d1=s.nextInt();

rat r2=new rat(n1,d1);

rat r3=new rat(0,0);

int ch;

do

{

/*

*shows menu

*/ System.out.println("Enter the choice \n1.addition \n2.subtraction \n3.Multiplication \n4.division\n5.exit");

ch=s.nextInt();

switch(ch)

{

case 1:

r3.add(r1,r2);

r3.simplify();

System.out.println("additon result is"+r3.numerator+"/"+r3.denominator);

break;

case 2:

r3.sub(r1,r2);

r3.simplify();

System.out.println("subtraction result is"+r3.numerator+"/"+r3.denominator);

break;

case 3:

r3.mul(r1,r2);

r3.simplify();

System.out.println("multiplication result is"+r3.numerator+"/"+r3.denominator);

break;

case 4:

r3.div(r1,r2);

r3.simplify();

System.out.println("divison result is"+r3.numerator+"/"+r3.denominator);

break;

case 5:

System.exit(0);

break;

}

}while(ch!=6);

}

}

Input & Output:

Enter n and d of rational number 1: 2

4

Enter n and d of rational number 1: 2

4

Enter choice 1.Add 2.Subtract 3.Multiply 4.Divide 5.Exit: 1

Sum : 1

Enter choice 1.Add 2.Subtract 3.Multiply 4.Divide 5.Exit: 2

Diff: 0

Enter choice 1.Add 2.Subtract 3.Multiply 4.Divide 5.Exit: 3

Prod: ¼

Enter choice 1.Add 2.Subtract 3.Multiply 4.Divide 5.Exit: 4

Quo: 1

Enter choice 1.Add 2.Subtract 3.Multiply 4.Divide 5.Exit: 5

Banking System in Java

CODE:

import java.util.*;

class bankInternal {

int ac;

float bal, amt;

Scanner get = new Scanner(System.in);

void getdetails()

{

System.out.print("Enter Account Number:");

ac = get.nextInt();

System.out.println();

System.out.print("Enter Initial Balance:");

bal = get.nextFloat();

}

void deposit()

{

System.out.println();

System.out.print("Enter Amount:");

amt = get.nextInt();

bal = bal+amt;

System.out.println("Success! Amount deposited. Balance Available:"+bal);

}

void withdraw()

{

System.out.println();

System.out.print("Enter Amount:");

amt = get.nextInt();

if(amt>bal)

{

System.out.println("Insufficient Funds!!");

}

else

{

bal = bal-amt;

System.out.println("Amount Withdrawn! Available Balance:"+bal);

}

}

void balchk()

{

System.out.println("Balance available in Account Number "+ac+" is: "+bal);

}

}

public class bankArray {

public static void main(String args[])

{

boolean a=true;

int acno, flag, acno2,n;

Scanner in = new Scanner(System.in);

bankInternal obj[] = new bankInternal[100];

System.out.print("Enter number of accounts:");

n=s.nextInt();

for(int i=0;i<n;i++)

{

obj[i] = new bankInternal();

}

int ch;

do

{

flag=1; //Reset flag value.

System.out.println("1.AddAccount"+"\n"+"2.Deposit"+"\n"+"3.Withdraw"+"\n"+"4.Check Balance"+"\n"+”\n5.Transfer”+"6.Exit");

System.out.println();

System.out.print("Enter your Choice:");

ch = in.nextInt();

switch(ch)

{

case 1:for(int i=0;i<n;i++)

{

obj[i].getdetails();

}

break;

case 2: System.out.println("Enter Account Number:");

acno = in.nextInt();

for(int i=0;i<n;i++)

{

if(acno == obj[i].ac)

{

obj[i].deposit();

flag=0;

}

}

if(flag==1)

{

System.out.println("Account number not found!!"+"\n");

}

break;

case 3: System.out.println("Enter Account Number:");

acno = in.nextInt();

for(int i=0;i<n;i++)

{

if(acno == obj[i].ac)

{

obj[i].withdraw();

flag=0;

}

}

if(flag==1)

{

System.out.println("Account number not found!!"+"\n");

}

break;

case 4: System.out.println("Enter Account Number:");

acno = in.nextInt();

for(int i=0;i<n;i++)

{

if(acno == obj[i].ac)

{

obj[i].balchk();

flag=0;

}

}

if(flag==1)

{

System.out.println("Account number not found!!"+"\n");

}

break;

case 5: System.out.println("Enter Account Number from which money is to be transferred:");

acno = in.nextInt();

System.out.println("Enter Account Number to which money is to be transferred:");

acno2 = in.nextInt();

System.out.println("Enter amount:");

acmt = in.nextInt();

for(int i=0;i<n;i++)

{

if(acno == obj[i].ac)

{

obj[i].bal-=acmt;

System.out.print(“Success! Amount withdrawn. Balance available:”+obj[i].bal);

flag=0;

}

for(int i=0;i<n;i++)

{

if(acno2 == obj[i].ac)

{

obj[i].bal+=acmt;

System.out.print(“Success! Amount deposited. Balance available:”+obj[i].bal);

flag=0;

}

}

if(flag==1)

{

System.out.println("Account number not found!!"+"\n");

}

break;

case 6: System.exit(0);

default: System.out.println("Enter a valid Option!"+"\n\n");

}

}while(a);

}

}

Input & Output:

Enter number of accounts: 2

1.Add Account

2.Deposit

3.Withdraw

4.Check Balance

5.Transfer

6.Exit

Enter Your Choice: 1

Enter account number: 123

Enter initial balance: 1000

Enter account number: 124

Enter initial balance: 500

1.Add Account

2.Deposit

3.Withdraw

4.Check Balance

5.Transfer

6.Exit

Enter Your Choice: 2

Enter account number: 126

Account number not found.

Enter Your Choice: 2

Enter account number: 123

Enter amount: 500

Success! Amount deposited.. Balance available: 1500

Enter Your Choice: 3

Enter account number: 124

Enter amount: 250

Success! Amount withdrawn.. Balance available: 250

Enter Your Choice: 4

Enter account number: 123

Balance available in 123 is 1500.

Enter Your Choice: 5

Enter account number from which money is to be transferred: 123

Enter account number to which money is to be transferred: 124

Enter amount: 500

Success! Amount withdrawn. Balance available: 1000

Success! Amount deposited. Balance available: 750

Enter choice: 6

GPA COMPUTATION IN JAVA

import java.io.*;

import java.util.*;

class gpa1

{

void func()

{

int i,j,n;

float gpa;

String name;

int rno,credit;

char grade[]=new char[5];

int a[]=new int[5];

int sum=0,creditcount=0;

Scanner s=new Scanner(System.in);

System.out.println("Enter the student name:");

name=s.next();

System.out.println("Enter the rollnumber:");

rno=s.nextInt();

System.out.println("Enter number of subjects:");

n=s.nextInt();

for(i=0;i<n;i++)

{

System.out.print("Enter the grade acquired in subject"+i+":");

grade[i]=s.next().charAt(0);

System.out.println("Enter the credits for subject"+i+":");

credit=s.nextInt();

creditcount+=credit;

if(grade[i]=='s')

sum+=10*credit;

else if(grade[i]=='a')

sum+=9*credit;

else if(grade[i]=='b')

sum+=8*credit;

else if(grade[i]=='c')

sum+=7*credit;

else if(grade[i]=='d')

sum+=6*credit;

else if(grade[i]=='e')

sum+=5*credit;

else

sum+=0;

}

gpa=(float)sum/creditcount;

System.out.println("\n\n\nName:"+name+”\n”);

System.out.println("RollNumber:"+rno+”\n”);

System.out.println("Your gpa is"+gpa);

}

}

class gpa

{

public static void main(String[] arg)

{

gpa1 g=new gpa1();

g.func();

}

}

Input & Output:

Enter student name: VaithyuanathanJohn

Enter roll number: 1

Enter number of subjects: 5

Enter the grade acquired in subject 1:S

Enter the credits for subject:4

Enter the grade acquired in subject 2:A

Enter the credits for subject:4

Enter the grade acquired in subject 3:B

Enter the credits for subject:3

Enter the grade acquired in subject 4:S

Enter the credits for subject:3

Enter the grade acquired in subject 5:A

Enter the credits for subject:3

Name:

RollNumber: 1

Your gpa is 9.235

Symbol Table creation in C

Source file:

#include<stdio.h>
#include<string.h>
void print();
FILE * f,*fp;
struct symbol
{
int address;
char label[15],opcode[15],operand[15];
}s[20];
int count=0;
int dupcheck(int m)
{
int i;
for(i=0;i<=m-1;i++)
{
if(strcmp(s[i].label,s[m].label))
return 1;
else return 0;
}
}
void delete()
{
int i=0;
char lab[15],ch[10];
printf("Enter the value to delete :");
scanf("%s",lab);
while(strcmp(s[i].label,lab))
{
i++;
}
strcpy(s[i].label,"");
print();
}
void search()
{
char sym[15];
printf("\n Enter the sym to Search :");
scanf("%s",sym);
int i,h;
for(i=0;i<count;i++)
{
if(strcmp(s[i].label,sym)==0)
h=1;
}
if(h==1)
{
printf("\n Element Present.");
}
else printf("\n False.");
}
void insert()
{
int i;
printf("\nEnter the value to insert :");
char lab[15];
scanf("%s",lab);
strcpy(s[count].label,lab);
count++;
for(i=0;i<count;i++)
printf("%s",s[i].label);
print();
}
void mod()
{
int i;
char lab[15],lab1[15];
printf("\n Enter the value to modify");
scanf("%s",lab);
printf("\n Enter the new value :");
scanf("%s",lab1);
for(i=0;i<count;i++)
{
if(strcmp(s[i].label,lab)==0)
strcpy(s[i].label,lab1);
}
print();
}
void print()
{
FILE *fp1;
fp1=fopen("symboltable.txt","w");
int i;
for(i=0;i<=count;i++)
fprintf(fp,"%s\n",s[i].label);
fclose(fp1);
}
main()
{
FILE *f;
f=fopen("src.txt","r");
int ch,i=0;
fp=fopen("symboltable.txt","w");
char lab[15];
while((fscanf(f,"%s %s %s",s[i].label,s[i].opcode,s[i].operand))!=EOF)
if(strcmp(s[i].label,"NULL"))
{
if((strcmp(s[i].opcode,"WORD"))||(strcmp(s[i].opcode,"RESW")))
{
if(dupcheck(i))
{
fprintf(fp,"%s\n",s[i].label);
count++;
}
else
printf("\n %s already exists",s[i].label);
}
i++;
}
fclose(fp);
do
{
printf("\n Enter Choice:\n1.insert\n2.delete\n3.display\n4.search\n5.modify\n");
scanf("%d",&ch);
switch(ch)
{
case 1: insert();
break;
case 2: delete();
break;
case 3: fp=fopen("symboltable.txt","r");
while((fscanf(fp,"%s",lab))!=EOF)
printf("\n %s",lab);
fclose(fp);
break;
case 4: search();
break;
case 5: mod();
break;
}
}while(ch<6);
}

Input file:

src.txt file

NULL LDA ONE

NULL ADD TWO

NULL STA THREE

FORTY WORD 5

NINE WORD 6

TWELVE RESW 12

FOUR WORD 4

FORTY WORD 6

Output file:

symboltable.txt

FORTY

NINE

TWELVE

FOUR