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)ios::trunc is used for ?
a)If the file is opened for output operations and it already existed, no action is taken.
b)If the file is opened for output operations and it already existed, its previous content is deleted and replaced
by the new one.
c)If the file is opened for output operations and it already existed, then a new copy is created.
d)None of above
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- 372. To use information stored in a file, it must be a. Accessed into computer memory b. Read into computer memory c. Retrieved from computer memory d. Both a and bpython only*** define the following functions; Function 1. writeStringToFile(fileName, text): This function overwrites the contents of the file named fileName with the string text. Must Define writeStringToFile Use def to define writeStringToFile Use a open file expression Within the definition of writeStringToFile, use open(___) or open(___, ___=_) in at least one place. Use a file .write() call Within the definition of writeStringToFile, use _.write(_) in exactly one place. Function 2. readFirstLines(fileName, numLines): This function reads the first numLines lines of the file named fileName, returning them as a list of strings (each of which includes a terminating newline character, if there is one). If there are fewer than numLines lines in the file, returns a list of all the lines in the file. Define readFirstLines Use def to define readFirstLines Use a open file expression Within the definition of readFirstLines, use open(___) or open(___, ___=_) in…1-) Write a code to do following operationsa-print the contents of filewrite a function to print the contents of a given file on screen. Your function prototypeshould be in given format.void PrintFileContent(FILE* fptr)b-copy contents of one file to another filewrite a function to copy contents of one file to another file. Convert all characters intouppercase while copying the content. You are allowed to use toupper() function in ctypelibrary. Your function prototype should be in given format.void copy_file(FILE* fptr1,FILE* fptr2)c- count the Number of Characters in a Filewrite a function to count the Number of Characters in a File. Your function prototypeshould be in given format.int findNumberofChar(FILE* fptr)Please design your main.c file as follow1- Open a text file to read in your directory.2- Create an empty text file for writing and reading in same directory.3- Check if both files are opened.4- Print the contents of first file by calling PrintFileContent function.5- Call…
- Write a single statement to accomplish each of the following. Assume that each of thesestatements applies to the same program.a) Write a statement that opens the file "oldmast.dat" for reading and assigns the returned file pointer to ofPtr.b) Write a statement that opens the file "trans.dat" for reading and assigns the returnedfile pointer to tfPtr.c) Write a statement that opens the file "newmast.dat" for writing (and creation) and assigns the returned file pointer to nfPtr.d) Write a statement that reads a record from the file "oldmast.dat". The record consistsof integer accountNum, string name and floating-point currentBalance.e) Write a statement that reads a record from the file "trans.dat". The record consists ofthe integer accountNum and floating-point dollarAmount.f) Write a statement that writes a record to the file "newmast.dat". The record consists ofthe integer accountNum, string name and floating-point currentBalance.The 'a' mode appends new data to the end of an existing file. But if the file is nonexistent, it does not create a new one to append the data.True or False1. (Practice) Enter the data for the info.txt file in Figure 9.1 or download it from this book’s Web site. Then enter and execute Program 9.5 and verify that the backup file was written. 2. (Modify) Modify Program 9.5 to use a getline() function in place of the get()method currently in the program. =============1 - 9.1========== #include <iostream>#include <fstream>#include <cstdlib> // needed for exit()#include <string>using namespace std; int main(){string fileOne = "info.txt"; // put the filename up frontstring fileTwo = "info.bak";char ch;ifstream inFile;ofstream outfile;try //this block tries to open the input file{// open a basic input streaminFile.open(fileOne.c_str());if (inFile.fail()) throw fileOne;} // end of outer try blockcatch (string in) // catch for outer try block{cout << "The input file " << in<< " was not successfully opened." << endl<< " No backup was made." << endl;exit(1);}try // this block tries to…
- 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 TestingWhat is a file's read position? What is the start read location of a file?The_______________ directive inserts a file in another file.
- Compiler returning errors. Screenshot of File.txt as well as compiler errors included. //importing necessary header files #include<iostream> #include<fstream> #include<string> using namespace std; //writing a function to open the file and checking the file failure bool openTheFile(ifstream& x,string fileName){ //open the file x.open(fileName); //if file doesnt open if(x.fail()) { //then return false return false; } //otherwise returns true return true; } //writing a function to read file and counting the number of integers, //calculating sum and average of the given function*/ void calculateFile(ifstream& myFile,int& sum,int& total_num,double& average ){ //declaring variables int count=0; string output; //checking end of file by using eof while (!myFile.eof()) { //displaying data myFile >> output; sum+=stoi(output); //incrementing count variable count++; } //assigning value of count variable to total_num total_num = count; //calculating…WriteaC++programthatpromptstheusertoenterafilenamethatcontains the total mark of students. Each line in the input file contains a student name followed by the student’s total mark. The program should ask the user for the passing threshold (i.e. student whose total mark is greater than or equal the threshold will pass the course) and copy the students who pass the course to a new file (the name of the output file is specified by the user). Moreover, the output file should be format so that all the marks are displayed with two digits after the decimal point. The width for the names and marks fields should be eight and seven, respectively. A sample input and output files are shown below (the passing mark in this sample is assumed to be 60). Total.txt Ahlam 80.123 Bader 83.1 Nabil 91.25 Khoula 70 Saif 55.333 Salem 50 Sultan 92.5 Qais 77.2Compiler returning errors with calculations and declarations. Screenshot of File.txt included. //importing necessary header files #include<iostream> #include<fstream> #include<string> using namespace std; //writing a function to open the file and checking the file failure bool openTheFile(ifstream& x,string fileName){ //open the file x.open(fileName); //if file doesnt open if(x.fail()) { //then return false return false; } //otherwise returns true return true; } //writing a function to read file and counting the number of integers, //calculating sum and average of the given function*/ void calculateFile(ifstream& myFile,int& sum,int& total_num,double& average ){ //declaring variables int count=0; string output; //checking end of file by using eof while (!myFile.eof()) { //displaying data myFile >> output; sum+=stoi(output); //incrementing count variable count++; } //assigning value of count variable to total_num total_num = count;…