references:
File
sprintf
Task and Solution Code From a damaged (or deleted) card data, recover original jpeg images. [details]
My Solution #include <stdio.h>#include <stdlib.h>#include <stdint.h> typedef uint8_t BYTE; int main(int argc, char *argv[]) { // Check if parameter validity if (argc != 2) { printf("Usage: ./recover image\n"); return 1; } // Open input file char *infile = argv[1]; FILE *inptr = fopen(infile, "r"); if (inptr == NULL) { fprintf(stderr, "Could not open %s.
Until this lesson, the term “data structure” reminded me only of the “data types” that variables can have. But I learned that data structure rather referred to how multiple data is stored and accessed in different methods.
Array Though I’ve used arrays in so many different languages, since there were a lot of simplification applied to the arrays in Javascript and Python, I only came to know of the restrictions that arrays have.
Sorting and Locking Pairs for Tideman (CS50 Problem Set 3) The Original Problem Explained (Tideman) The Problem Encountered Although with the test sets provided with the example seemed to work just fine with the code I originally wrote, when graded, it showed that my code didn’t lock the pairs correctly (meaning it didn’t lock what it was supposed to, and locked pairs where it should have skipped).
1. Sorting Problem Instructions
Problem Create a program that uses Luhn’s Algorithm to identify if the input number is a valid credit card number for AMEX, MASTERCARD, and VISA. Breaking Down the Problem Basic Characteristics of Credit Card Numbers 1. The numbers have specific **digits** (AMEX: 15, MASTER: 16, VISA: 13 or 16 ) 2. The **first two digits** of the number are also specific (AMEX: 34 or 37, MASTER: 51~55, VISA: 40~49) Luhn’s Algorithm Not only does the number have to fit the requirements above, it also needs to be validated through Luhn’s Algorithm which is as follows: