c program to find the greatest between two number

To compare between two number follow the logic
e.g- if a>b is true then a is greater else b is greater.

using if else

#include <stdio.h>
int main()
{
 int a,b;
 printf("Enter two numbers\n");
 scanf("%d%d",&a,&b);
 if(a>b)
 printf("%d is greatest\n",a);
 else
 printf("%d is greatest\n",b);
 return 0;
}

OUTPUT:
Enter two numbers
11
22
22 is greatest

using conditional operator

#include <stdio.h>
int main()
{
 int a,b;
 printf("Enter two numbers\n");
 scanf("%d%d",&a,&b);
 (a>b)?printf("%d is greatest\n",a):printf("%d is greatest\n",b);
 return 0;

}

OUTPUT:
Enter two numbers
47
24

47 is greatest

c program to find the greatest between three number

To find the greatest between three number follow the logic 
consider three numbers a,b,c.
step-1: first compare a with b.
step-2: if step-1 is true compare a with c
step-3: if step-2 is true, print a is greater or if step-2 false print c is greater.
step-4: if step-1 is false, compare b with c.
step-5: if step-4 is true, print b is greater or if step-4 is false print c is greater.  

using if else

#include <stdio.h>

int main()

{

 int a,b,c;

 printf("Enter three numbers\n");

 scanf("%d%d%d",&a,&b,&c);

 if(a>b)

 {

  if(a>c)

  printf("%d is greatest\n",a);

  else

  printf("%d s greatest\n",c);

 }

 else

 {

  if(b>c)

  printf("%d is greatest\n",b);

  else

  printf("%d is greatest\n",c);

 }

return 0;

}

OUTPUT:

Enter three numbers

15

18

17

18 is greatest

using conditional operator

#include <stdio.h>

int main()

{

 int a,b,c;

 printf("Enter three numbers\n");

 scanf("%d%d%d",&a,&b,&c);

 (a>b)?

 ((a>c)?printf("%d is greatest\n",a):printf("%d s greatest\n",c)):

 ((b>c)?printf("%d is greatest\n",b):printf("%d is greatest\n",c));

return 0;

}

OUTPUT:

Enter three numbers

24

32

49

49 is greatest

c program to find the greatest between four number

To find the greatest between four numbers follow the logic
consider four numbers a,b,c,d.
step-1: first compare a with b(a>b).
step-2: if step-1 is true compare a with c(a>c).
step-3: if step-2 is true compare a with d(a>d).
step-4: if step-3 is true, print a is greater or if step-3 false print d is greater.
step-5: if step-2 is false, compare c with d.
step-6: if step-5 is true, print c is greater or if step-5 is false print d is greater. 
step-7: if step-1 is false compare b with c(b>c)
step-8: if step-7 is true compare b with d(b>d).
step-9: if step-8 is true, print b is greater or if step-8 false print d is greater.
step-10: if step-7 is false compare c with d(c>d).
step-11: if step-10 is true, print c is greater or if step-10 false print d is greater.

using if else

#include <stdio.h>

int main()

{

int a,b,c,d;

printf("Enter four number\n");

scanf("%d%d%d%d",&a,&b,&c,&d);

if(a>b)

   {

     if(a>c)

        {

           if(a>d)

            printf("%d is greatest\n",a);

           else

            printf("%d is greatest\n",d);

        }

      else

        {

          if(c>d)

          printf("%d is greatest\n",c);

          else

printf("%d is greatest\n",d);

 }

   }

else

   {

     if(b>c)

        {

           if(d>b)

            printf("%d is greatest\n",d);

           else

            printf("%d is greatest\n",b);

        }

      else

        {

          if(c>d)

          printf("%d is greatest\n",c);

          else

          printf("%d is greatest\n",d);

         }

   }

return 0;

}

OUTPUT:

Enter four number

14

78

25

34

78 s greatest

using conditional operator

#include <stdio.h>

int main()

{

int a,b,c,d;

printf("Enter four number\n");

scanf("%d%d%d%d",&a,&b,&c,&d);

(a>b)?

   (

    (a>c)?((a>d)?printf("%d is greatest\n",a):printf("%d is greatest\n",d)):

     ((c>d)?printf("%d is greatest\n",c):printf("%d is greatest\n",d))

   ):

   ((b>c)?((d>b)?printf("%d is greatest\n",d):printf("%d is greatest\n",b)):

    ((c>d)?printf("%d is greatest\n",c):printf("%d is greatest\n",d))

   );      

return 0;

}

OUTPUT:

Enter four number

41

65

52

34

65 is greatest

Swapping of two numbers using c language

              To interchange, the value of two variables is known as swapping.
              Example:- Before execution a=2, b=3
                                After execution a=3, b=2

     #include <stdio.h>
  int main()
   {
    int a,b,c;
    printf("Enter value for a\n");
    scanf("%d",&a);
    printf("Enter value for b\n");
    scanf("%d",&b);
    c=a;
    a=b;
    b=c;
    printf("After swapping a=%d b=%d",a,b);
    return 0;   
   }

output: Enter value for a

               10

               Enter value for b

               20

               After swapping a=22 b=11

  swapping of two number without using third variable

      on the above example, we need a third variable c to store the value temporarily but here the following c program only need two variable to swap the values.

   #include <stdio.h>

   int main()

    {

     int a,b;

     printf("Enter value for a\n");

     scanf("%d",&a);

     printf("Enter value for b\n");

     scanf("%d",&b);

     a=a+b;

     b=a-b;

     a=a-b;

     printf("After swapping a=%d b=%d",a,b);

    }

output: Enter value for a

               11

               Enter value for b

               22

               After swapping a=22 b=11

How to find the ASCII value of any character

        ASCII-American standard code for information interchange.

   ASCII table maintains a unique seven-bit number for each character using which the computer understands which key is pressed, following program will help to find the ASCII value for the entered character.


  #include <stdio.h>
  int main()
  {
   char c;
   printf("Enter a character\n");
   scanf("%c",&c);
   printf("ASCII value of '%c' is %d\n",c,c);
   return 0;
  }

output:-

   Enter a character

   s  

   ASCII value of 's' is 115

program to find the character from its ASCII value

   #include <stdio.h>

   int main()

   {

    int a;

    printf("Enter the ASCII value (in decimal)\n");

    scanf("%d",&a);

    printf("character for ASCII %d is %c\n",a,a);

    return 0;

   }

output:-

  Enter the ASCII value (in decimal)

  65

  character for ASCII 65 is A

C Program To Calculate Average Of four Integer

 it is a single number that is used to represent a collection of numbers.                    

Average =Sum/Count

#include<stdio.h>

int main()

{

int a,b,c,d;

float avg;

printf("Enter four numbers:\n");

scanf("%d%d%d%d",&a,&b,&c,&d);

avg=(a+b+c+d)/4.0;                 //4.0 is for type casting

printf("Average=%f\n",avg);

}

OUTPUT:

Enter four numbers:

25

65

45

88

Average=55.750000

Program to calculate area and perimeter of rectangle, sqare and circle using C language

 
         
       

Shape	Area	Perimeter
Rectangle	Length x width	2*(length+width)
Square	Side x side	Side x 4
Circle	πr2	2πr

#include <stdio.h>

int main()

{

int length,width,side;

float radius,pi=3.14;

int a_rect,p_rect,a_sq,p_sq;

float a_cir,p_cir;

printf("Enter length and width for rectangle\n");

scanf("%d%d",&length,&width);

printf("Enter sides of the square\n");

scanf("%d",&side);

printf("Enter radius of the circle\n");

scanf("%f",&radius);

a_rect=length*width;

p_rect=2*(length+width);

a_sq=side*side;

p_sq=4*side;

a_cir=pi*radius*radius;

p_cir=2*pi*radius;

printf("For rectangle:Area=%d, Perimeter.=%d\n",a_rect,p_rect);

printf("For square:Area=%d, Perimeter=%d\n",a_sq,p_sq);

printf("For circle:Area=%f, Perimeter=%f\n",a_cir,p_cir);

}

OUTPUT:
Enter length and width for rectangle
18 15
Enter sides of the square
12
Enter a radius of the circle
6.5
For rectangle:Area=270, Perimeter.=66
For square:Area=144, Perimeter=48

For circle:Area=132.664993, Perimeter=40.820000

C program to calculate simple interest

       Simple interest is a method of calculating interest charged on fixed deposit

    Formula  i=(Ptr/100)

    Where i:Interese

               p:Principal

               t:time period

               r:rate of interest/year

    #include <stdio.h>

    int main()

    {

    int principal,time;

    float r,i;

    printf("input principal amount\n");

    scanf("%d",&principal);

    printf("input time (in year)\n");

    scanf("%d",&time);

    printf("input the rate of interest\n");

    scanf("%f",&r);

    i=(principal*time*r)/100;

    printf("Total interest %f\n",i);

    }

  OUTPUT:

     input principal amount

    10000

     input time (in year)

     4

     input the rate of interest

     7.5

     total interest 3000.000000