123.45700000000000123.457123.456699999999999123.457123.45700000000000123.4567123.45700000000000123.457123.456699999999998123.45700000000000123.457123.457 What are the contents of the "Output.txt" file when you execute the following codesnippet?int main().{}double salary = 123.4567;ofstream out_file;out_file.open("Output.txt");outfile << left <

There are a couple of issues in your code. It seems there's a typo in the variable name for the…

What are the contents of the "Output.txt" file when you execute the following code snippet? int main(). { } double salary ofstream out_file; = 123.4567; out_file.open ("Output.txt"); outfile << left <

What are the contents of the "Output.txt" file when you execute the following code snippet? int main(). { } double salary ofstream out_file; = 123.4567; out_file.open ("Output.txt"); outfile << left <

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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#include <stdio.h> struct clientData { unsigned int acctNum; char lastName[15]; char firstName[10]; double balance; }; unsigned int enterChoice(void);void textFile(FILE* readPtr);void updateRecord(FILE* fPtr);void newRecord(FILE* fPtr);void deleteRecord(FILE* fPtr); int main(void) { FILE* cfPtr; if ((cfPtr = fopen("accounts.dat", "rb+")) == NULL) { puts("File could not be opened."); } else { unsigned int choice; while ((choice = enterChoice()) != 5) { switch (choice) { case 1: textFile(cfPtr); break; case 2: updateRecord(cfPtr); break; case 3: newRecord(cfPtr); break; case 4: deleteRecord(cfPtr); break; default: puts("Incorrect…
Find the error: #include<stdio.h> #include<stdlib.h> int main() { unsigned char; FILE *fp; fp=fopen("trial", "r"); if(!fp) { printf("Unable to open file"); exit(1); } fclose(fp); return 0; }
C++ Write a code segment that creates an ofstream object named outfile, opens a file named numfile.txt, and associates it with outfile. Then write the contents of the variable data to the file, followed by a newline, then close the file.
#include <fstream> #include <iostream> using namespace std; // PLACE YOUR NAME HERE const int MAXNAME = 20; int main() { ifstream inData; inData.open("grades.txt"); char name[MAXNAME + 1]; // holds student name float average; // holds student average inData.get(name,MAXNAME+1); while (inData){ inData >> average; // Fill in the code to print out name and // student average // Fill in the code to complete the while // loop so that the rest of the student // names and average are read in properly } return 0; }
BinaryFileRead.cpp // BinaryFileRead.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include <iostream> using namespace std; int main() { int *arrayToSort; char fileName[50]; int size,readVal; cout << "Enter a filename to sort => "; cin >> fileName; FILE *inFile; fopen_s(&inFile,fileName, "rb"); fread(&size, sizeof(size), 1, inFile); arrayToSort = new int[size]; for (int i = 0; i < size; i++) { fread(&readVal, sizeof(readVal), 1, inFile); arrayToSort[i] = readVal; } fclose(inFile); return 0; } Timing.cpp // Timing.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include <iostream> #include <time.h> //ctime #include <sys/timeb.h> //_timeb _ftime_s using namespace std; int main() { struct _timeb timebuffer; char timeline[26]; _ftime_s(&timebuffer); ctime_s(timeline,sizeof(timeline), &(timebuffer.time)); printf("The time is %.19s.%hu %s", timeline,…
SUBJECT NAME IS C++: WAP to read 4 student objects and write them into a file, then print total number of student number in file. After that read an integer and print details of student stored at this number in the file using random access and file manipulators
FILE* inFile = fopen("filenam.txt", "r"); Given the above code segment, which of the following would output "FILE NOT FOUND" if the file could not be opened? Group of answer choices if(inFile == NULL) { printf("FILE NOT FOUND"); } if(inFile) { printf("FILE NOT FOUND"); } if(!inFile->is_open()) { printf("FILE NOT FOUND"); } None of these ============= What does sscanf do? Group of answer choices Reads from a file Reads from a keyboard Reads from a string Writes to a screen =========== What comes first in the software development life cycle? Group of answer choices Algorithm design Identifying the problem Coding Testing
#include #include #include #include #include #include void dft(uint8_t*, double*, int); void dft print(double, int, double); #define N 512 int main(int argc, char **argv) { char *port = argv[1]; /* Open the file */ int fd = open(port, O_RDONLY); // code to set communication rate to 9600 bits per second struct termios tio; tcgetattr(fd, &tio); cfset speed(&tio, B9600); tcsetattr(fd, 0, &tio); // reopen the serial port so that the speed change takes effect close(fd); fd = open(port, O_RDONLY); if (fd #include #include #include void dft(uint8_t* x, double* X, int N) { double Xr[N]; double Xi[N]; for (int k=0; k 70) count = 70; printf("%031d", Irint (bounds[k]*fs/N)); for (int j=0; j < count; j++) { } } printf("*"); printf("\n"); for (int k=0; k < NBUCKETS; k++) { printf("\033[A"); } }
#include #includesstdlib.h> int main(void){ int number , reverse = 0, digit , temp; FILE *infile, *outfile; int status; //open the input file and check if an error occurred infile = fopen( "numbers.txt" , "r" ); //open the input file if(infile == NULL){ printf("Error: File \"numbers.txt\" not found!\n"); exit (1); //open the output file and check if error occurred outfile = fopen( "Report.txt" , "w" ); if(outfile == NULL){ printf("Error: File \"Report.txt\" can not be created!\n"); exit (1); status = fscanf(infile , "%d" , &number); //read first number from the file /To read all the numbers in the file while(status != EOF){ printf("%d is read from the file\n" , number); fprintf(outfile , "%8d" , number); //compute the reverse of the number temp = number ; reverse = 0; while(temp != 0){ digit = temp % 10; reverse = reverse * 10 + digit; temp = temp/10; printf("The reverse is: %d \n", reverse); fprintf(outfile , "%8d" , reverse); //check whether the number is palindrome if(number ==…
TRUE FALSE The dereference operator * is used to obtain the address of a variable. The void functions return noting when called. the flag eof() is FALSE at the beginning of a text file. There is no way to show text on graphic screen The reserved word struct is used when declaring a void function.
A MyPetStore sells many pets and their accessories. As new pets are added to the MyPetStore, theirinformation is entered into a flat text file. Each month, the manager requests a listing of all pets sorted bytheir price. You must write a program to produce a report of MyPetStore and their types sorted by their pricesfrom the data in the flat text file. Below is a description of the information on the text file:• The first entry is the number of animals on the file (numeric) •The fields below repeat for each animal:o Pet name (String)o Birthdate (java.time.LocalDate)o Price (numeric)o Species Type (String)o Special feature (boolean or String)The animals sold by the MyPetStore are of six types: Dogs & Cats, Reptiles, Birds, Rabbits & SmallAnimals.For Dogs & Cats, the special feature field on the flat file is the breed of the animal (String).For Reptiles, the special feature field is the blood type (warm vs cold-blooded, String).For Birds, the special feature field is the…
Unfortunately, the change from int to Month means that it's harder to read Date objects from an input file, since it doesn't work if a user enters Date::jan. Write a toMonth function that can be used to enter a month as an integer. Throw invalid_argument if it fails. Month m = toMonth (3); // returns Month::mar udts.cpp 1 #include 2 #include 3 #include "date.h" using namespace std; 4 6. /** Construct a valid Month. 7 8. @param mm the month in the range 1-12 9. @exception throw invalid_argument if out of range. @return the correct Month. 10 11 */ Month toMonth(int mm) { 12 13 14 15 16 17 } Demo.cpp 1 #include 2 #include 3 #include "date.h" 4 using namespace std; 5 6 int main() 7 { cout « "Enter date as mm/dd/yyyy: "; int mm, dd, yyyy; char slash; cin >> mm >> slash » dd >> slash » yyyy; 8 10 11 12 13 try { Date d = makeDate (toMonth(mm), dd, yyyy); cout <« "The date is " << d << endl; } catch (invalid_argument& e) { cout « e.what() « endl; } 14 15 16 17 18 19 20 21 22 }