practice hsc 2

#include <stdio.h>

int isVowel(char ch)
{
    char vowels[10] = "aeiouAEIOU";

    for(int i = 0; i<10; i++)
    {
        if(ch == vowels[i]) return 1;
    }

    return 0;
}

int main()
{
    char ch;
    scanf("%c", &ch);

    if(isVowel(ch)) {
        printf("%c is vowel\n", ch);
    }
    else {
        printf("%c is consonant\n", ch);
    }

    return 0;
}


/*

vowels

a e i o u A E I O U
0 1 2 3 ....      9

vowels[0]-> 'a'
vowels[1]-> 'e'
..
vowels[9]-> 'U'


*/





#include <stdio.h>


int main()
{
    int n = 4;

    for(int i = 1; i<=n; i++)
    {
        int sp = n - i;
        int st = 2 * i - 1;

        for(int j = 1; j <= sp; j++) printf(" ");
        for(int j = 1; j <= st; j++) printf("*");
        printf("\n");
    }

    for(int i = 1; i<n; i++)
    {
        int sp = i;
        int k = n - i;
        int st = 2 * k - 1;
        for(int j = 1; j <= sp; j++) printf(" ");
        for(int j = 1; j <= st; j++) printf("*");
        printf("\n");
    }

    return 0;
}


/*

1
22
333
4444
55555

2 * i - 1

N = 4

   *       [sp = 3, st = 1]
  ***      [sp = 2, st = 3]
 *****     [sp = 1, st = 5]
*******    [sp = 0, st = 7]
 *****     [sp = 1, st = 5] i = 1
  ***      [sp = 2, st = 3]
   *       [sp = 3, st = 1]


   n = 4
   5 i = 3
   3 i = 2
   1 i = 1



*/