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

int main(void) {

    char* s = NULL;
    size_t s_len = 0;

/* Start taking input, dynamically. */

    printf("Input a string...\n");

    do {

        s = realloc( s , ++s_len * sizeof(char) );

    } while ( ( s[ s_len - 1 ] = getchar() ) != '\n' );

    s[--s_len] = 0x00;

/* End dynamic input procedure. */

    printf("\n%s\n", s);
    printf("s_len = %i\n", (int)s_len);

    free(s);

    return 0;
}