Question

1. An expression such as pow(2,3) is called a(n) ____________________.

2. Which header file contains the sqrt function?

3. Which header file contains the setFill function?

4. Which header file contains string functions?

5. What is the syntax of the ignore function?

6. The get function presented in this chapter only reads values of type ____________________.

7. Write a statement to format the output of decimal numbers to two decimal places.

8. To force the output to show the decimal point and trailing zeros of a decimal number, use the ____________________ manipulator.
9. The header file ____________________ needs to be included to use the setw function

Answer 1

1. An expression such as pow(2,3) is called a function call.

Explanation: Function calls are used to invoke the function definition by passing arguments.

Here, 2,3 are arguments to the function pow().

2. Which header file contains the sqrt function? cmath.h

Explantion: cmath.h is a header containing functions prototypes for mathematical operations.

sqrt() is used to find the square root of a number.

Some other functions are exp(),cos(),sin(), log(),pow()

3. Which header file contains the setFill function?  iomanip.h

Explantion: iomanip.h is a library for output formatting  .

setFill() is used to fill the output stream with a character.

Some other functions are setw(),setiosflags()

4. Which header file contains string functions? string.h

Explantion: string.h is a library for string functions .

Some functions in string.h are strcat(),strncat(),strcmp(),strcpy()

5. What is the syntax of the ignore function? cin.ingnore(streamsize,delimiter)

Explantion: cin.ingnore(streamsize,delimiter)

6. The get function presented in this chapter only reads values of type character.

7. Write a statement to format the output of decimal numbers to two decimal places.

std::cout<<std::fixed<<std::setprecision(2);

Explanation:  std::fixed - is used used to apply setprecision() to floating part of the decimal

std::setprecision(2) - is used to set the precision to two decimals.

8. To force the output to show the decimal point and trailing zeros of a decimal number, use the showpoint manipulator.

9.The header file iomanip.h needs to be included to use the setw function