Cau1.c

#include <stdio.h>

int isConsonant(char ch)
{
    if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z'))
    {
        if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u' || ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U')
        {
            return 0;
        }
        else
        {
            return 1;
        }
    }
    else
    {
        return 0;
    }
}

void consonant(const char *s)
{
    for (char c = *s; c; c = *++s)
    {
        if (isConsonant(c))
        {
            printf("%c", c);
        }
    }
}