#pragma once
#include <time.h>
char *randstring(size_t length) {

    static char charset[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";        
    char *randomString = NULL;
		time_t t;
    if (length) {
        randomString = malloc(sizeof(char) * (length +1));
				srand((unsigned) time(&t));
        if (randomString) {            
            for (int n = 0;n < length;n++) {            
                int key = rand() % (int)(sizeof(charset) -1);
                randomString[n] = charset[key];
            }

            randomString[length] = '\0';
        }
    }

    return randomString;
}