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