Assume a program has the following variable definitions:

int units;

float mass;

double weight;

and the following statement

weight = mass * units;

Which automatic data type conversion will take place?

a) mass is demoted to an int, units remains an int, and the result of mass * units is an int.

b) units is promoted to a float, mass remains a float and the result of mass * units is a float.

c) units is promoted to a float, mass remains a float and the result of mass * units is a double.

Question

Computers and Technology

Reilly Mack

1 December, 22:04

Assume a program has the following variable definitions:

int units;

float mass;

double weight;

and the following statement

weight = mass * units;

Which automatic data type conversion will take place?

a) mass is demoted to an int, units remains an int, and the result of mass * units is an int.

b) units is promoted to a float, mass remains a float and the result of mass * units is a float.

c) units is promoted to a float, mass remains a float and the result of mass * units is a double.

+4

Answers (1)

Know the Answer?

Kamryn Ballard · Answer 1

C

Explanation:

As the unit is defined as integer type i. e. unit will have whole number, mass is defined as float data type which will have fractional values, and weight is defined as double data type which can have both values i. e. fractional value or integer value.

If you multiply an integer value by a fractional/decimal value it will give fractional value (unit value will promote to fractions).

Thus, result will be fractional value so result of unit*mass will be double.