zihengCat

import hashlib as hasher
import datetime as date
class Block:
    def __init__(self, index, timestamp, data, previous_hash):
        self.index = index
        self.timestamp = timestamp
        self.data = data
        self.previous_hash = previous_hash
        self.hash = self.hash_block()
    def hash_block(self):

zihengCat

#include <stdio.h>
#include <stdlib.h>
int main(int argc, char* argv[]) {

    FILE *fp;
    if (argc != 2 ||
       (fp = fopen(argv[1], "r")) == NULL) {

        perror("File opening failed");
        return EXIT_FAILURE;

zihengCat

int get_utf8_size(const unsigned char *p_input) {                                  
                                                                                                    
    unsigned char c = *p_input;     /* get UTF-8 first Byte */                     
/*                                                                                 
 * 0xxxxxxx --> 1                                                                  
 * 10xxxxxx --> -1 (invalid)                                                       
 * 110xxxxx --> 2                                                                  
 * 1110xxxx --> 3                                                                  
 * 11110xxx --> 4                                                                  
 * 111110xx --> 5