Function to check vowel.

Function to check vowel.

int check_vowel(char a)

{

    if (a >= 'A' && a <= 'Z')

       a = a + 'a' - 'A';   /* Converting to lower case or use a = a + 32 */

    if (a == 'a' || a == 'e' || a == 'i' || a == 'o' || a == 'u')

       return 1;

    return 0;

}

Check vowel using switch statement.

Check vowel using switch statement.

#include <stdio.h>

int main()

{

  char ch;

  printf("Input a character\n");

  scanf("%c", &ch);

  switch(ch)

  {

    case 'a':

    case 'A':

    case 'e':

    case 'E':

    case 'i':

    case 'I':

    case 'o':

    case 'O':

    case 'u':

    case 'U':

      printf("%c is a vowel.\n", ch);

      break;

    default:

      printf("%c is not a vowel.\n", ch);

  }              

  return 0;

}

C program to check whether input alphabet is a vowel or not.

C programming code.

 

#include <stdio.h>

int main()

{

  char ch;

  printf("Enter a character\n");

  scanf("%c", &ch);

  if (ch == 'a' || ch == 'A' || ch == 'e' || ch == 'E' || ch == 'i' || ch == 'I' || ch =='o' || ch=='O' || ch == 'u' || ch == 'U')

    printf("%c is a vowel.\n", ch);

  else

    printf("%c is not a vowel.\n", ch);

  return 0;

}

Output of Program:

C program to find nCr using function.

C program to find nCr using function.

#include<stdio.h>

long factorial(int);

long find_ncr(int, int);

long find_npr(int, int);

main()

{

   int n, r;

   long ncr, npr;

   printf("Enter the value of n and r\n");

   scanf("%d%d",&n,&r);

   ncr = find_ncr(n, r);

   npr = find_npr(n, r);

   printf("%dC%d = %ld\n", n, r, ncr);

   printf("%dP%d = %ld\n", n, r, npr);

   return 0;

}

long find_ncr(int n, int r)

{

   long result;

   result = factorial(n)/(factorial(r)*factorial(n-r));

   return result;

}

long find_npr(int n, int r)

{

   long result;

   result = factorial(n)/factorial(n-r);

   return result;

}

long factorial(int n)

{

   int c;

   long result = 1;

   for( c = 1 ; c <= n ; c++ )

      result = result*c;

   return ( result );

}