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Practical no.1

Write a C program to display hexadecimal decimal octal format of the
entered numbers.
#include<stdio.h>
#include<conio.h>
void main()
{
intnum;
clrscr();
printf("Enter the number : ");
scanf("%d",&num);
printf("nDecimal format : %d",num);
printf("nHexaDecimal format : %x",num);
printf("nOctal format : %o",num);
getch();
}

OUTPUT:

Enter the number:12

Decimal format :12

Hexadecimal format:c

Octal format:14

Practical no.2

To demonstrate all possible formatting specifiers.

Format Specifiers for C
%c The character format specifier.
%d The integer format specifier.
%i The integer format specifier (same as %d).
%f The floating-point format specifier.
%e The scientific notation format specifier.
%E The scientific notation format specifier.
%g Uses %f or %e, whichever result is shorter.
%G Uses %f or %E, whichever result is shorter.
%o The unsigned octal format specifier.
%s The string format specifier.
%u The unsigned integer format specifier.
%x The unsigned hexadecimal format specifier.
%X The unsigned hexadecimal format specifier.
%p Displays the corresponding argument that is a pointer.
%n Records the number of characters written so far.
%% Outputs a percent sign.

printf statements is called an escape sequence:
n (newline)
t (tab)
v (vertical tab)
f (new page)
b (backspace)
r (carriage return)
n (newline)

Practical no.3

Write a program to find the largest and the smallest from the given
three integers.
#include<stdio.h>

#include<conio.h>

void main()

{

int num1, num2, num3;

clrscr();

printf("Enter three numbers = ");

scanf("%d %d %d", &num1, &num2, &num3);

printf("nnThe largest number is ");

if( (num1 > num2) && (num1 > num3) )

printf("%d", num1);

else if(num2 > num3)

printf("%d", num2);

else

printf("%d", num3);

printf("nnThe Smallest number is ");

if( (num1 < num2) && (num1 < num3) )

printf("%d", num1);

else if(num2 < num3)

printf("%d", num2);

else

printf("%d",num3);

getch();

}

OUTPUT:

Enter three numbers: 12

15

67

The largest no. is :67

The smallest no.is :12

Practical no.4
Write a C program to find even or odd numbers.
#include<stdio.h>
main()
{

intnum;

printf ("Enter a number to be checked for even/odd: ");
scanf ("%d",&num);

if (num%2==0)
{
printf ("The entered number is EVEN.n");

}
else
{
printf ("The entered number is ODD.n");

}
}

OUTPUT:

Enter a number to be checked for even/odd:15

The entered number is ODD.

Practical no.5
Write a C program to display menu 1.Addition 2.Subtraction
3.Multiplication 4.Division and execute it using switch case.
#include<stdio.h>
#include<conio.h>
void main()
{
inta,b,c;
int menu;
printf("choose the arithmetic optionn");
scanf("%d",&menu);
switch(menu)
{
case 1:
printf("Enter The Two Numbers:n");
scanf("%d%d",&a,&b);
c=a+b;
printf("The addition of two numbers %dn",c);
break;

case 2:
printf("Enter THE TWO NUMBERS:n");
c=a-b;
printf("The subtraction of two numbers %dn",c);
break;

case 3:

c=a*b;
printf("The multiplication of two numbers %dn",c);
break;

case 4:

c=a/b;
printf("The division of two numbers %dn",c);
break;
}

getch();
}

OUTPUT:

choose the arithmetic option

2

Enter THE TWO NUMBERS:

15 6

The subtraction of two numbers :9

Practical no.6
Write a c program to perform addition all numbers from 1 to 100.
#include<stdio.h>
#include<conio.h>

void main()

{

int i=0,sum=0;

clrscr();

while(i<100)

{

sum=sum+i;

i++;

}

printf("Addition of all numbers from 1-100=%d",sum);

getch();

}

OUTPUT:

Addition of all numbers from 1-100=4950

Practical no.7

Write a C program to find smallest and largest number from array
elements.
#include<stdio.h>
#include<conio.h>
Void main()

{

int a[20],min,max;

intn,i;

clrscr();

printf("enter the num of elementst:");

scanf("%d",&n);

printf("enter the elementsn");

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

{

scanf("%d",&a[i]);

if(i==0)

{

min=max=a[i];

}

if(a[i]<min)

min=a[i];

else if(a[i]>max)

max=a[i];

}

printf("largest element is %d n Smallest element is %d ",max,min);

getch();

}

OUTPUT:

enter the num of elements:5

enter the element:12

56

23

10

78

largest element is 78

Smallest element is 10

Practical no.8
Write a C program to enter elements for 3*3matrix and display them.
#include<stdio.h>
#include<conio.h>
void main()
{
int a[3][3],i,j;
clrscr();
printf("ENTER ELEMENTSn");
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
scanf("%d",&a[i][j]);
}
}
printf("THE ELEMENTS IN 3*3 MATRIX FORM ISn");
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
printf("%d",a[i][j]);
}
printf("n");
}
getch();
}

OUTPUT:

ENTER ELEMENTS
1
2
3
4
5
6
7
8
9
THE ELEMENTS IN 3*3 MATRIX FORM IS
1 2 3
4 5 6
7 8 9

Practical no.9
Write a C program to demonstrate output of standard library
functions. Strlent( ),strcpy( ),strcat( ),strcmp( ).
#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
{
char s1[10],s2[10],s3[30];
int a;
clrscr();
printf("enter the two stringsn");
scanf("%s%s",&s1,&s2);
printf("1st String=%sn2ndString=%s",s1,s2);
if(strcmpi(s1,s2) == 0 )
printf("Entered strings are equal.n");
else
printf("Entered strings are not equal.n");

a=strlen(s1);
printf("nLength=%d",a);
strcat(s1,s2);
printf("nconcatinated string=%s",s1);
strcpy(s1,s2);
printf("ncopied string=%s",s1);

getch();
}

OUTPUT:

enter the two strings
Good
Morning
1st String=Good
2ndString=Morning
Entered strings are not equal.
Length=4
concatinated string=GoodMorning
copied string=Morning

Practical no.10
Write a C program to calculatefactorial of any number using
recursion.
#include<stdio.h>
#include<conio.h>
int fact(int );
int main()
{
intnum,res;
printf("Enter any number: ");
scanf("%d", &num);
res = fact(num);
printf("Factorial value is: %d",res);
getch();
return 0;
}
int fact(int n)
{
int f;
if(n==1)
return(1);
else
f = n*fact(n-1);
return(f);
}

OUTPUT:

Enter any number:5

Factorial value is:120

Practical no.11
Write a C program to demonstrate call by value and call by reference.
//CALL BY VALUE
#include<stdio.h>
#include<conio.h>
int swap(int,int);
void main()
{
inta,b;
printf("nenter two values:");
printf("Before swapping:n");
printf("A=%dn B=%d",a,b);
swap(a,b);
getch();
}

int swap(intx,int y)
{
int temp;
temp=x;
x=y;
y=temp;

printf("After swapping:n A=%dnB=%d",x,y);
return(0);
}

OUPUT:
enter two values
30
20
Before swapping:
A=30
B=20
After swapping:
A=20
B=30

//CALL BY REFERENCE
#include<stdio.h>
#include<conio.h>
int swap(int *,int *);
void main()
{
inta,b;
printf("nenter two values:");
printf("Before swapping:n");
printf("A=%dn B=%d",a,b);
swap(&a,&b);
getch();
}
int swap(int *x,int *y)
{
int temp;
temp=*x;
*x=*y;
*y=temp;
printf("After swapping:n A=%dnB=%d",*x,*y);
return(0);
}

OUPUT:
enter two values
30
20
Before swapping:
A=30
B=20
After swapping:
A=20
B=30

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