Predicate Macros

Lab C Intermediate 20 points

Define IS_EVEN(n), IS_VOWEL(c) (lower-case only) and IS_DIGIT(c) macros. Read a word and print how many characters are vowels, how many are digits, and whether its length is even.

Input

One word.

Output

One line: vowels=V digits=D even=yes|no

Example

Input

education2026

Output

vowels=5 digits=4 even=no

Sample input available Sample output available

Editor

Hints

Macros that evaluate to 1 or 0 can be used directly in if conditions.

Solution explanation

Beware: a macro argument is evaluated every time it appears, so never pass something like c++.

Show solution

#include <stdio.h>
#include <string.h>
#define IS_EVEN(n) ((n) % 2 == 0)
#define IS_VOWEL(c) ((c) == 'a' || (c) == 'e' || (c) == 'i' || (c) == 'o' || (c) == 'u')
#define IS_DIGIT(c) ((c) >= '0' && (c) <= '9')

int main() {
    char w[100];
    int vowels = 0, digits = 0;
    scanf("%s", w);
    for (int i = 0; w[i] != '\0'; i++) {
        if (IS_VOWEL(w[i])) vowels++;
        if (IS_DIGIT(w[i])) digits++;
    }
    printf("vowels=%d digits=%d even=%s\n", vowels, digits, IS_EVEN((int) strlen(w)) ? "yes" : "no");
    return 0;
}

Output

Answer