Assuming dataFile is an ofstream object associated with a disk file named payroll.dat, which of the following statements would write the value of the salary variable to the file
A) cout < B) ofstream C) dataFile << salary;
D) payroll.dat <

Answer:

dataFile << salary;

Explanation:

To write salary to a file (payroll.dat) using ofstream, you make use of the following instruction:

ofstream dataFile;

myfile.open ("payroll.dat");

myfile <<salary;

myfile.close();

This line creates an instance of ofstream

ofstream dataFile;

This line opens the file payroll.dat

myfile.open ("payroll.dat");

This is where the exact instruction in the question is done. This writes the value of salary to payroll.dat

myfile <<salary;

This closes the opened file

myfile.close();

Write a program that reads an integer between o and 1000 and adds all the digits in the integer. For example, if an integer is 932, the sum of all the digits is 14. Hint: Use the % operator to extract digits, and use the / operator to remove the extracted digit. For instance, 932 % 10=2 and 932/10 =93. Here is a sample run:
Enter a number between 0 and 1000 : 999
The sum of digits is 27.

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