Inside Macintosh: PowerPC Numerics / Part 2 - The PowerPC Numerics C Implementation

Chapter 9 - Conversion Functions

Converting Integers to Floating-Point Formats

In the C programming language, conversions from integers stored in an integer format to floating-point formats are automatic when you assign an integer to a floating-point variable.

double d;
int x = 1;
d = x;      /* value 1 automatically converted to double format */