#include <stdio.h>

/**
 * print a given string char by char using pointer arithmetic
 * @param str string to print
 */
void print_string(char *str);

/**
 * similar to print_string but using recursion
 * @param str string to print
 */
void print_string_rec(char *str);

int main(int argc, char **argv) {
    for (int i = 0; i < argc; ++i) {
        print_string(*argv);
        argv++;
        putchar('\n');
    }
    return 0;
}

void print_string(char *str) {
    while(*str != '\0') {
        putchar(*str);
        str++;
    }
}

void print_string_rec(char *str) {
    if (*str == '\0') {
        return;
    }
    putchar(*str);
    ++str;
    print_string_rec(str);
}