Ejercicio 18 Boletín 3

#include <stdio.h>
#include <string.h>

int num_between(char text[], int c1, int c2) {
    int cnt, total;
    int code;

    for (total = cnt = 0; cnt < strlen(text); cnt++) {
        code = (int) text[cnt];
        if (code >= c1 && code <= c2)
            total++;
    }

    return total;
}

int num_lower(char text[]) {
    return num_between(text, (int) 'a', (int) 'z');
}

int num_upper(char text[]) {
    return num_between(text, (int) 'A', (int) 'Z');
}

int num_digit(char text[]) {
    return num_between(text, (int) '0', (int) '9');
}

int main() {
    char text[100];

    printf("Introduce un texto: ");
    scanf("%s", text);

    printf("%s contiene:\n", text);
    printf("\t%d minusculas\n", num_lower(text));
    printf("\t%d mayusculas\n", num_upper(text));
    printf("\t%d letras\n", num_lower(text) + num_upper(text));
    printf("\t%d digitos\n", num_digit(text));

    return 0;
}