Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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- 2. Write a simple encryption/decryption program. Function encrypt takes a character pointer as a parameter and uses pointer-subscript notation to change the value in the address pointed to by adding 1 to it. Function decrypt takes a character pointer as a parameter and uses pointer notation to change the value in the address pointed to by subtracting 1 from it. Function main calls functions encrypt and decrypt and prints the encrypted string. // A simple encryption/decryption program #include "stdafx.h" #include using namespace std; // write the prototype for function encrypt // write the prototype function decrypt int main() { // create a string to encrypt char string[] = "this is a secret!"; cout « "Original string is : " « string « endl; encrypt(string); cout « "Encrypted string is : « string <« endl; decrypt(string); cout <« "Decrypted string is : «string<< endl;arrow_forwardWrite a code in sim8085 for the following problem: The pressure of two boilers is monitored and controlled by a microcomputer works based on microprocessor programming. A set of 6 readings of first boiler, recorded by six pressure sensors, which are stored in the memory location starting from 2050H. A corresponding set of 6 reading from the second boiler is stored at the memory location starting from 2060H. Each reading from the first set is expected to be higher than the corresponding position in the second set of readings. Write an 8085 sequence to check whether the first set of reading is higher than the second one or not. If all the readings of first set is higher than the second set, store 00 in the ‘D’ register. If any one of the readings is lower than the corresponding reading of second set, stop the process and store FF in the register ‘D’. Data (H): First set: 78, 89, 6A, 80, 90, 85 Second Set:71, 78, 65, 89, 56, 75arrow_forwardWrite a short C program that declares and initializes (to any value you like) a double, an int, and a char. Next declare and initialize a pointer to each of the three variables. Your program should then print the address of, and value stored in, and the memory size (in bytes) of each of the six variables.arrow_forward
- 3. Create an 80x86 ASSEMBLY LANGUAGE program that define an array of doubleword numbers then read twovalues, first one indicates how many actual numbers will be in the array, and an integer n. Theprogram should display all of the numbers in the array that are greater than the number n. MUST PROVIDE FULL CODE AND SCREENSHOT OF OUTPUT PLEASEarrow_forwardYou are to write an Intel x86 assembly language program which makes useof a loop to access the individual elements of the array containing the ASCIIcharacters. You are to initialize the array with the following db directive: message db 'juMping JAck flaSh #1',10, 0 The ASCII character represented by decimal value 10 (0x0A) is the line feedcharacter (similar to endl in C++). The byte with all zeros (the so called NULL character in ASCII) is used to represent the end of the string. Before entering the loop, which performs the case conversion, the program is to display on the screen the (original) contents of the string. Within the loop, the program is to determine whether the current character represents a lower case character. If the character is lower case, it is to be converted into its uppercase version. Non-alphabetic characters are to remain as is. Upon convertingall the lower case characters, the program is to display the string on the screen. Here is an example of a correct…arrow_forwardWrite program segments that perform the operation C C+ A x B using each of the instruction classes indicated in Exercise 1 above. Assume that A, B, and C are memory 3. addresses. lleuing data Lin thearrow_forward
- You must complete this in Python and the programs should not take any command-line arguments. You also need to make sure your programs will compile and run in at least a Linux environment. In this problem, you need to implement operation bit encoding for Assembly instructions. Given a line of text, your program should check whether it is a valid Assembly instruction type. If it is, your program should print out the opcode and optype of that instruction type; if the line of text is not exactly a valid Assembly instruction, your program should skip it and move to the next line of input without printing anything. Input Format The input to the program will consist of some number of lines. Each line contains some text, either a valid Assembly instruction type (with no extra whitespace or other characters, e.g. READ on a line by itself) or some other text. Constraints There are no specific constraints on the length or number of lines. They will be in a reasonable limit, as demonstrated by…arrow_forwardAssume a computer system has a main memory of 256 Bytes. The following is a memory byte-access trace history of a program run on this system. For example, as it is shown, the program first accesses memory address 0000 0000, and then it accesses memory address 0000 0001 and so on. Note the memory addresses are represented in binary: 00000000, 00000001, 00000010, 00000011, 00001000, 00010000, 00010001, 00000100, 00000101, 00000110, 00000111, 00001001, 00001010, 00001011, 00001100, 00001000, 00001001, 00001010, 00011100, 00011101.arrow_forward
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