Printable ascii characters (tiny helper)

printable_ascii_characters.c

#include <stdio.h>
/* 
    The conversion from `int` to `char` in this sequence is not to guaranteed to work on all systems.
    See more in the comments of the accepted answer: http://stackoverflow.com/questions/21196926
*/
int main() {
    int i;
    int e = 0;
    char numbers[11];
    char alpha_capital[27];
    char alpha_lower[27];
    char alphanumeric[11 + 2 * 27 + 1];
    char *label[] = {
        "numbers",
        "ALPHABET",
        "alphabet",
        "special chars",
        "alphanumeric"
    };
    void print_title(char *s);
    void print_content(char *s);

    print_title(label[0]);
    for (i = 48; i < 58; i++) {
        numbers[e++] = i;
        printf("%c:%d ", numbers[e-1], i);
    }
    numbers[e] = '\0'; e = 0;
    print_content(numbers);

    print_title(label[1]);
    for (i = 65; i < 91; i++) {
        alpha_capital[e++] = i;
        printf("%c:%d ", alpha_capital[e-1], i);
    }
    alpha_capital[e] = '\0'; e = 0;
    print_content(alpha_capital);
    
    print_title(label[2]);
    for (i = 97; i < 123; i++) {
        alpha_lower[e++] = i;
        printf("%c:%d ", alpha_lower[e-1], i);
    }
    alpha_lower[e] = '\0'; e = 0;
    print_content(alpha_lower);

    print_title(label[3]);
    for (i = 33; i < 126; i++) {
        if (i == 48) {
            i += 9;
            continue;
        }
        if (i == 65) {
            i += 25;
            continue;
        }
        if (i == 97) {
            i += 25;
            continue;
        }
        printf("%c ", i);
    }

    sprintf(alphanumeric, "%s%s%s", alpha_capital, alpha_lower, numbers);
    printf("\n\n%s\n%6s%s\n", label[4], "", alphanumeric);
}

void print_title(char *s) {
    printf("%s\n%6s", s, "");
}

void print_content(char *s) {
    printf("\n%6s%s\n\n", "", s);
}