COMPUTER SCIENCE
(PRACTICAL PROGRAMMES)
1)
Programme to enter three
digit number and display it in words.
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int sum,num,rev=0,rem,i,len;
int count1=0,count2=0;
cout<<" enter a three digit
number ";
cin>>num;
for(i=num;i>0;i=i/10)
{
rem=i%10;
rev=rev*10+rem;
count1=count1+1;
}
for(i=rev;i>0;i=i/10)
{
count2=count2+1;
rem=i%10;
switch(rem)
{
case 1:
cout<<"\t one ";
break;
case 2:
cout<<"\t two ";
break;
case 3:
cout<<"\t three ";
break;
case 4:
cout<<"\t four ";
break;
case 5:
cout<<"\t five ";
break;
case 6:
cout<<"\t six ";
break;
case 7:
cout<<"\t seven ";
break;
case 8:
cout<<"\t eight ";
break;
case 9:
cout<<"\t nine ";
break;
}}
len=count1-count2;
for(i=0;i<len;i++)
{
cout<<"\t zero";
}
getch();
}
2)
Programme to find given
number is prime or not.
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int num,i,flag=0;
cout<<"enter a number ";
cin>>num;
for(i=2;i<=num/2;++i)
{
if(num%i==0)
{
flag=1;
break;
}
}
if(flag==1||num==0||num==1)
{
cout<<"the number is not prime" ;
}
else
{
cout<<"the number is prime";
}
getch();
}
3)
Programme to check whether
the string is palindrome or not.
#include<iostream.h>
#include<conio.h>
#include<string.h>
void main()
{
clrscr();
int big,end,i,length,flag=0;
char a[100];
cout<<"enter a string";
cin>>a;
length=strlen(a);
end=length-1;
for(big=0;big<=end;big++)
{
if(a[big]!=a[end])
{
flag=1;
break;
}
else
{
end=end-1;
}
}
if(flag==1)
{
cout<<"string is not paliandrome";
}
else
{
cout<<"string is
paliandrome";
}
getch();
}
4)
Programme to find smallest
and largest number using array.
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int a[100],i,j,limit,temp;
cout<<"enter a limit";
cin>>limit;
cout<<"enter
"<<limit<<"numbers";
for(i=0;i<limit;i++)
{
cin>>a[i];
}
for(i=0;i<limit-1;i++)
{
for(j=j+1;j<limit;j++)
{
if(a[i]>a[j])
{
temp=a[i];
a[i]=a[j];
a[j]=temp;
}
}
}
cout<<"largest number in
arrey" ;
cout<<"\t"<<a[limit-1];
cout<<"smallest number in
arrey";
cout<<"\t"<<a[0];
getch();
}
5)
Programme to sort the given
number in ascenting order.
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int a[100],i,j,limit,temp;
cout<<"enter a limit";
cin>>limit;
cout<<"enter "<<limit<<"numbers";
for(i=0;i<limit;i++)
{
cin>>a[i];
}
for(i=0;i<limit-1;i++)
{
for(j=i+1;j<limit;j++)
{
if(a[i]>a[j])
{
temp=a[i];
a[i]=a[j];
a[j]=temp;
}
}
}
cout<<"arrey after
sorting";
for(i=0;i<limit;i++)
{
cout<<"\t"<<a[i];
}
getch();
}
6)
Decimal to binary
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int binnum[100],decimal,i,rem,num;
cout<<"enter a decimal
number";
cin>>num;
i=0;
for(decimal=num;decimal>0;decimal=decimal/2)
{
rem=decimal%2;
binnum[i]=rem;
i=i+1;
}
cout<<"binary equivalent
is";
if(num==0)
{
cout<<"0";
}
else
{
for(int
j=i-1;j>=0;j--)
{
cout<<binnum[j];
}
}
getch();
}
7)
Amstrong or not.
#include<iostream.h>
#include<conio.h>
#include<math.h>
void main()
{
clrscr();
int num,sum=0,rev,val,rem;
cout<<"enter the number ";
cin>>num;
val=num;
while(num!=0)
{
rem=num%10;
sum=sum+pow(rem,3);
num=num/10;
}
if(val==sum)
{
cout<<"the given number
"<<"\t"<<val<<"amstrong";
}
else
{
cout<<"the given number
"<<"\t"<<val<<"not amstrong";
}
getch();
}
8)
Sum of elements in matrix.
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int a[100][100],i,j,row,col,sum=0;
cout<<"enter the row and col
size";
cin>>row>>col;
cout<<"enter the elements of
metrix";
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{
cin>>a[i][j];
}
}
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{
sum=sum+a[i][j];
}
}
cout<<"sum of
elemebts"<<sum;
getch();
}
9)
Factorial of a number using
recursive function.
#include<iostream.h>
#include<conio.h>
long factorial(long);
void main()
{
clrscr();
long int n,result;
cout<<"enter a number " ;
cin>>n;
result=factorial(n);
cout<<"factorial is
"<<result;
getch();
}
long factorial(long a)
{
long int fact;
if(a<=1)
{
return 1;
}
else
{
fact=a*factorial(a-1);
return(fact);
}
}
10)
Sum of diagonal elements.
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int i,sum=0,a[10][10],j,row,col;
cout<<"\n enter the number of
row and col";
cin>>row>>col;
cout<<"enter the elements
for"<<row<<"x"<<col<<"matrix";
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{
cin>>a[i][j];
}
}
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{
if(i==j)
{
sum=sum+a[i][j];
}
}
}
cout<<"sum of diagonal elemebts
"<<sum;
getch();
}
11)
Swapping using pointer.
#include<iostream.h>
#include<conio.h>
void swap(int*,int*);
void main()
{
clrscr();
int a,b;
cout<<"enter two numbers ";
cin>>a>>b;
cout<<"before
swapping"<<"a="<<a;
cout<<"b="<<b;
swap(&a,&b);
getch();
}
void swap(int *p1,int *p2)
{
int *t;
t=p1;
p1=p2;
p2=t;
cout<<"after
swapping"<<"a="<<*p1<<"b="<<*p2;
}
12)
Add two matrix.
#include<iostream.h>
#include<conio.h>
class matrix
{
public:
int
i,j,row,col,a[10][10],b[10][10],c[10][10];
void getdata();
void sumdata();
void putdata();
};
void matrix :: getdata()
{
cout<<"enter the size of row and
col";
cin>>row>>col;
cout<<"enter the values for
first
"<<col<<"x"<<row<<"matrix" ;
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{
cin>>a[i][j];
}
}
cout<<"enter the values for
second
"<<col<<"x"<<row<<"matrix" ;
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{
cin>>b[i][j];
}
}
}
void matrix :: sumdata()
{
cout<<"sum of metrix is ";
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{
c[i][j]=a[i][j]+b[i][j];
}
}
}
void matrix ::putdata()
{
for(i=0;i<row;i++)
{
cout<<"\n";
for(j=0;j<col;j++)
{
cout<<c[i][j]<<"\t";
}
}
}
void main()
{
clrscr();
matrix obj;
obj.getdata();
obj.sumdata();
obj.putdata();
getch();
}
13)
Subtract two matrix.
#include<iostream.h>
#include<conio.h>
class matrix
{
public:
int i,j,row,col,a[10][10],b[10][10],c[10][10];
void getdata();
void subdata();
void putdata();
};
void matrix :: getdata()
{
cout<<"enter the size of row and
col";
cin>>row>>col;
cout<<"enter the values for
first
"<<col<<"x"<<row<<"matrix" ;
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{
cin>>a[i][j];
}
}
cout<<"enter the values for
second
"<<col<<"x"<<row<<"matrix" ;
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{
cin>>b[i][j];
}
}
}
void matrix :: subdata()
{
cout<<"sum of metrix is ";
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{
c[i][j]=a[i][j]-b[i][j];
}
}
}
void matrix ::putdata()
{
for(i=0;i<row;i++)
{
cout<<"\n";
for(j=0;j<col;j++)
{
cout<<c[i][j]<<"\t";
}
}
}
void main()
{
clrscr();
matrix obj;
obj.getdata();
obj.subdata();
obj.putdata();
getch();
}
14)
Product of two matrix.
#include<iostream.h>
#include<conio.h>
class matrix
{
public:
int
i,j,k,row1,row2,col1,col2,a[10][10],b[10][10],c[10][10];
void input();
void process();
void output();
};
void matrix :: input()
{
cout<<"enter the size of row and
col";
cin>>row1>>col1;
cout<<"enter the values for
first
"<<col1<<"x"<<row1<<"matrix" ;
for(i=0;i<row1;i++)
{
for(j=0;j<col1;j++)
{
cin>>a[i][j];
}
}
cout<<"enter the size of row and
col";
cin>>row2>>col2;
if(col1==row2)
{
cout<<"enter the values for
second
"<<col2<<"x"<<row2<<"matrix" ;
for(i=0;i<row2;i++)
{
for(j=0;j<col2;j++)
{
cin>>b[i][j];
}
}
}
else
{
cout<<"multiplication not
possible";
}
}
void matrix :: process()
{
cout<<"sum of metrix is ";
for(i=0;i<row1;i++)
{
for(j=0;j<col2;j++)
{
c[i][j]=0;
for(k=0;k<row2;k++)
{
c[i][j]=c[i][j]+a[i][k]*b[k][j];
}
}
}
}
void matrix :: output()
{
for(i=0;i<row1;i++)
{
cout<<"\n";
for(j=0;j<col1;j++)
{
cout<<c[i][j]<<"\t";
}
}
}
void main()
{
clrscr();
matrix obj;
obj.input();
obj.process();
obj.output();
getch();
}
15)
Particular character is
present in a string.
#include<iostream.h>
#include<conio.h>
#include<stdio.h>
#include<string.h>
class character
{
public:
char a,str[50];
int i,flag;
void readdata();
void result();
};
void character::readdata()
{
cout<<"enter a string ";
gets(str);
cout<<"\n enter a
character";
cin>>a;
flag=0;
for(i=0;str[i]!='\0';i++)
{
if(str[i]==a)
{
flag=1;
}
}
}
void character::result()
{
if(flag==1)
{
cout<<"character is
present";
}
else
{
cout<<"character not
present";
}
}
void main()
{
clrscr();
character obj;
obj.readdata();
obj.result();
getch();
}
17)
Program to perform
arithmetic operation.
#include<iostream.h>
#include<conio.h>
#include<math.h>
class operations
{
int a;
float b;
float result;
public:
void input();
void sum();
void sub();
void mul();
void div();
};
void operations::input()
{
cout<<"\n enter the
numbers";
cin>>a>>b;
}
void operations::sum()
{
result=a+b;
cout<<"sum
is"<<result;
}
void operations::sub()
{
result=a-b;
cout<<"difference="<<result;
}
void operations::mul()
{
result=a*b;
cout<<"product="<<result;
}
void operations::div()
{
result=a/b;
cout<<"quotient="<<result;
}
void
main()
{
clrscr();
operations obj ;
obj.input();
obj.sum();
obj.sub();
obj.mul();
obj.div();
getch();
}
19)
PROGRAMME TO CONVERT
TEMPERATURE
#include<iostream.h>
#include<conio.h>
class temperature
{
int temp;
float result;
public:
void input();
void ctof();
void ftoc();
void display();
};
void temperature ::input()
{
cin>>temp;
}
void temperature ::display()
{
cout<<result;
}
void temperature ::ctof()
{
result=(1.8*temp)+32;
}
void temperature ::ftoc()
{
result=(temp-32)/1.8;
}
void main()
{
clrscr();
int choice;
char ch;
temperature obj;
do
{
cout<<"\n 1: farenheit to celcius";
cout<<"\n
2: celcius to farenhiet";
cout<<"\n choose your choice 1 or 2";
cin>>choice;
if(choice==1)
{
cout<<"enter temperature in f";
obj.input();
obj.ftoc();
cout<<"temperature in c is :";
obj.display();
}
else
{
cout<<"enter temperature in c";
obj.input();
obj.ctof();
cout<<"temperature in f is :";
obj.display();
}
cout<<"\n do you want to continue , Y or N";
cin>>ch;
}
while(ch=='y'||ch=='Y');
getch();
}
