Thread: counting distinct characters in string using pointers

Hi all,
I am trying to write a function that uses pointers to count the chars 'a', 'b', and 'c' in an input string.

heres my code. Thanks in advance

Code:

void count_abc(char *str, int *a, int *b, int *c) // a, b, c represents count for each letter
{
        while (*str != '\0')
        {
                if (*str == 'a')
                        a++;
                if (*str == 'b')
                        b++;
                if (*str == 'c')
                        c++;
        }
}

the main function is below

Code:

int main()
{
        char str[MAX_STR];
        int count_table[3] = {0,0,0};
        int *a_count=&count_table[0],*b_count=&count_table[1],*c_count=&count_table[2];

        printf("Enter a string of less than 50 characters:\n");
        scanf("%s",str);
        count_abc(str,a_count,b_count,c_count);
        printf("number of a = %d , number of b = %d , number of c = %d\n",count_table[0],count_table[1],count_table[2]);
}