C programming examples

C programming Example

-- Write a c Program to find largest among three numbers.

#include<stdio.h>
#include<conio.h>
void main()
{
int num1,num2,num3,highest;

clrscr();

printf("Enter first number");
scanf("%d",&num1);

printf("Enter second number");
scanf("%d",&num2);

printf("Enter third number");
scanf("%d",&num3);

if((num1>num2)&&(num1>num3))
{
printf("FIRST NO IS HIGHEST");
}
else if((num2>num1)&&(num2>num3))
{
printf("SECOND NO IS HIGHEST");
}
else
{
printf("THIRD NUMBER IS HIGHEST");
}
}






Example 2:- Write a program in c to calculate simple Interest .

/ /Function with argument and return value
//Calculate Simple Interest
#include<stdio.h>
#include<conio.h>
float calculatesi(int amt,float rate, float no)
{
float si;
si=(amt*no*rate)/100;
return si;
}
void main()
{
int p;
float n,r,si;
clrscr();
printf("\nEnter Principal Amount, no of years, rate of interest : ");
scanf("%d%f%f",&p,&n,&r);
si=calculatesi(p,n,r);
printf("\nSI=%f",si);
getch();
}



Example 3.

/*Write a program to print area of a circle. A(circle)= 3.142 * R * R in C language*/


#include<stdio.h>
#include<conio.h>

void main()

{

float AREA, R;
clrscr();

printf("Enter redius;");
scanf("%f",&R);

AREA = 3.14*R*R;
printf("AREA of the givan is %6.2f",AREA);

getch();

}



Example 4:-

/* write a program to print simple interest SI=(PNR)/100 in C lang */

#include<stdio.h>
#include<conio.h>
main()
{
float SI,P,N,R;
clrscr();
printf("\n enter Principle Amount:");
scanf("%f",&P);

printf("\n enter the number of years:");
scanf("%f",&N);

printf("\n enter the rate of interest:");
scanf("%f",&R);

SI=(P*N*R)/100;
printf(" \n Simple interest is : %6.2f",SI);
getch();
return(0);
}



Example 5:- /* Find a wheather number is a prime */

#include<stdio.h>
#include<conio.h>
void main()
{
int no,i,a=0;
printf("\n enter the numnber:");
scanf("%d",&no);
for(i=2;i<=no/2;i++)
{
if(no%i==0)
{
a=1;
break;
}
}
if(a==1)
printf("\n not a prime");
else
printf("\ entered number is a prime num:");
getch();
}


Example 6:- #include<stdio.h>
#include<conio.h>
main()
{
float AREA,B,H;
clrscr();
printf("Enter Base & Height: ");
scanf("%f%f",&B,&H);
AREA=0.5*B*H;
printf("Area of the given is : %6.2f",AREA);
getch();
}









Example 7 :-


•Write a program to print simple interest SI = (PNR)/100 in C language
#include<stdio.h>
#include<conio.h>
main()
{
float SI,P,N,R;
clrscr();
printf("Enter Principle Amount: ");
scanf("%f%f%f",&P,&N,&R);
SI=(P*N*R)/100;
printf("Simple Interest is : %6.2f",SI);
getch();
}


Example 8: /* Display the reverse of given number */
#include<stdio.h>
#include<conio.h>
void main()
{
int num,rem=0,rev=0;
clrscr();
printf("\n enter the number:");
scanf("%d",&num);
while(num>0)
{
rem=num%10;
num=num/10;
rev=rev*10+rem;
}
printf("\n the reverse of a number =%d",rev);
getch();
}


Example 9:- /*• Write a program to accept a number from user and print it’s square & cube in C language*/
#include<stdio.h>
#include<conio.h>
main()
{
int n,Square,Cube;
clrscr();
printf("Enter Number: ");
scanf("%d",&n);
Square=n*n;
Cube=n*n*n;
printf("\nSquare: %d\nCube: %d",Square,Cube);
getch();
}



Example 10:-

/*•Write a program to accept a number from user and print it’s square & cube in C language*/
#include<stdio.h>
#include<conio.h>
main()
{
int s,Square,Cube;
clrscr();
printf("Enter Number: ");
scanf("%d",&s);
Square=s*s;
Cube=s*s*s;
printf("\nSquare: %d\nCube: %d",Square,Cube);
getch();
return (0);
}


Example 11:- /* Write a program to accept a number and print if the number is Positive/Negative in C language*/
#include<stdio.h>
#include<conio.h>

main()
{
int num;
clrscr();
printf("Enter number..");
scanf("%d",&num);
if(num>0)
printf("Given number is positive");
else if(num<0)
printf("Given number is negative");
else
printf("Number is Zero");
getch();
return(0);
}


Example :-12 • Write a Simple Program to print numbers 1 to n using while loop in C language
#include<stdio.h>
#include<conio.h>
main()
{
int i=1,n;
clrscr();
printf("Enter n : ");
scanf("%d",&n);
while(i<=n)
{
printf("%d\t",i);
i++;
}
getch();
}

13:- /* Write a program to calculate the sum of n natural number given by user*/



#include<stdio.h>
#include<conio.h>


void main()
{
int n,i,sum=0;
clrscr(); //to clear the screen
printf("Enter the value of n:");
scanf("%d",&n);


for(i=1;i<=n;++i)
{
printf("\n%d",i);
sum+=i;
}
printf("\n\nSum of first n natural numbers is:%d",sum);
getch(); //to stop the screen
}




14. /* Source Code to Check Whether a Character is Vowel or consonant   */

#include <stdio.h>
int main(){
  char c;
  printf("Enter an alphabet: ");
  scanf("%c",&c);
  if(c=='a'||c=='A'||c=='e'||c=='E'||c=='i'||c=='I'||c=='o'||c=='O'||c=='u'||c=='U')
       printf("%c is a vowel.",c);
  else
       printf("%c is a consonant.",c);
  return 0;
}

15.- Write a program in c to accept two numbers from user &calculate their addition using function.

#include<stdio.h>

long addition(long, long);

main()
{
   long first, second, sum;

   scanf("%ld%ld", &first, &second);

   sum = addition(first, second);

   printf("%ld\n", sum);

   return 0;
}

long addition(long a, long b)
{
   long result;

   result = a + b;

   return result;
}



16:- Write Program to add natural number using recursive function

#include<stdio.h>


 # i n c l u d e < s t d i o . h >

 i n t   a d d ( i n t   x ) ;

 i n t   m a i n ( )

 {

         i n t   x ;

         p r i n t f ( " E n t e r   a n   p o s i t i v e   i n t e g e r :   " ) ;

         s c a n f ( " % d " , & x ) ;

         p r i n t f ( " S u m   =   % d " , a d d (x ) ) ;

         r e t u r n   0 ;

 }

 i n t   a d d ( i n t   x )

 {

         i f ( x ! = 0 )

           r e t u r n   n + a d d ( x - 1 ) ;     / *   r e c u r s i v e   c a l l   * /

 }




17:- //To check positive & negative number using function  */


#include<stdio.h>
#include<conio.h>
void checkNum(int);
void main()
{
  int x;
  clrscr();
  printf("Enter Number=");
  scanf("%d",&x);
  checkNum(x);
  getch();
}
void checkNum(int num)
{
  if (num==0)
  {
    printf ("\nNumber is zero");
  }
  else if(num>0)
  {
    printf("\nPositive Number");
  }
  else
  {
    printf("\nNegative Number");
  }
}