Question

1. 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.

Explanation:

In C - like languages, when an int and a float are used in an arithmetic operation, the int is promoted to a float first. Then, since the left - hand side of the assignment (weight which is a double) has a higher precision than float, the result of the multiplication (which is a float after the promotion of int) is promoted to a double for the assignment.

Answer:

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