Q4)write a M-file to calculate area and circumference of circle, If the user runs this program, he will read these messages "pleas enter value of radius "; and "R=", also if the user entered a negative value. he will read " please enter positive value" and " R= ", then the program returned the area and circumference of this circle?

Q4)write a M-file to calculate area and circumference of circle, If the user runs this program, he will read these messages "pleas enter value of radius "; and "R=", also if the user entered a negative value. he will read " please enter positive value" and " R= ", then the program returned the area and circumference of this circle?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Exercise Write the pseudo code and flowchart that will read a file of student test results and produce a student test grade report. Each test record contains the student number, name and test score (out of 50). The program is to calculate for each student the test score as a percentage and to print the student's number, test score (out of 50) and letter grade on the report. The letter grade is determined as follows: A = 90-100% B = 80-89% C = 70-79% 90-100 80-89 :A :B D = 60-69% E = 0 -59%
b) Table 1 shows the Motorcycle Sales Report in 2018 and 2019. Based on Table 1, write a C++ program to allow the user to input the type, sale2018, and sale2019 four times by using looping. Calculate the difference of sale between 2018 and 2019, and the percentage increasefor each type of the motorcycles. Store the data in a file name “report.txt”. The program should verify whether the file can be opened or not. The following is the formula to calculate the percentage increase: ?????????? ???????? = ??????????/????? ?? 2018 ? 100 Type Sale In 2018 Sales in 2019 Differences Percentage Increase Dual Sport 28452 32979 4527 13.73 Off Road 71536 73371 1835 2.50 Street 318104 324691 6586 2.02 Scooter 34294 27931 -6363 -22.78
Use Notepad++ to create a js file 1. Create variables to store adventurer names, number of adventurers killed, number of survivors and the leader name. 2. The survivors is equal to the number of adventurers - number killed 3. Display "Welcome to The God Among Us" 4. Display the introduction as: A group of adventurers began their search for the mystical god said to live among us. In charge of the squad was < display leader name here> who was famous for his past exploits. Along the way, the group of comrades were attacked by the god's loyal followers. The adventurers fought with bravado and strength under the tutelage of <display leader name here> the followers were defeated but they still suffered great losses. After a headcount of the remaining squad, <display number killed> were found to be dead which left only <display number of survivors> remaining survivors. -insert the variable values in the story as shown above by the text in between <>'s. 5.…
1 Encryption (a). Write a program that will utilise AES for encrypting and decrypting the data from a file as follows. Your program should take 3 arguments from the command line as input. The first input should be either 0 or 1 referring to encryption or decryption, respectively. The second input is the key filename. The third input is the either the plaintext or encrypted filename. If the first argument is 0: your program will read an AES key from a file titled key.txt (passed as second argument) and then will read the plaintext from a file titled plain- text.txt (passed as third argument), encrypt the contents of plaintext.txt using the key and save the ciphertext in a file titled encrypted.txt. If the first argument is 1, your program should decrypt the contents of encrypted.txt. Sample Command-line Inputs: java 0 key.txt plaintext.txt java 1 key.txt encrypted.txt
C++ code please
Make 3 text files that each one includes 10 names. Write a C++ program that asks the user to enter the name of the file that he wants to open. Then display contents in that file.
assume the file data.dat contains a sequence of binary data. write a program that does the following: displays the first 5 bytes stored in the file. each byte should be displayed on a separate line. starting with byte 0, displays every even-numbered byte in the file. (in other words, display byte 0, byte 2, byte 4, and so on.) each byte should be displayed on a separate line. starting with byte 1, displays every odd-numbered byte in the file. (in other words, display byte 1, byte 3, byte 5, and so on.) each byte should be displayed on a separate line. displays the last 5 bytes stored in the file, in reverse order. (display the last byte, then the next-to-last byte, and so on.) each byte should be displayed on a separate line. handle exceptions in the following manner: if a filenotfoundexception is thrown, the program should display the string "file error". if an eofexception is thrown, the program should display the string "eof error". if any other exception is thrown, the program…
make 3 text files that each one includes 10 names. write a C++ program that asks the user to enter the name of the file that he wants to open. Then display contents in that file.
C PROGRAMMING ONLY, Having trouble with this step as well, thank you so much for the help! NO IOSTREAM.H OR CACIO.H PLEASE I CANT USE THOSE HEADERS. Modify the given Script to meet the following conditions: Create a C script that will: 1) Read a text file “Data.txt”. The numbers in the first column of Data.txt are a1’s, thesecond column are a2’s, the third column are y(0)s and the fourth column are y’(0)s. 2) Use these numbers to find the Zero-Input Responses. (So, the user will not type inthose numbers. Your program should read those values from the Data.txt file automatically.Then, your program should compute the roots and required coefficients.) 3) Save the result (Coefficients) on “Result.txt” Here is the format for Result.txt;1) The first column indicates whether the system has nonrepeating real roots, repeatingreal roots, or complex conjugate roots. Use 1 for nonrepeating real roots, 2 for repeatingreal roots, and 3 for complex conjugate roots.2) The second column should be used…