Demonstrate fixed point numbers and arithmetic in C programming language.

The number of bits assigned to the integer and fractional parts of a fixed point representation are fixed by convention. Fixed point numbers are an integral data type and hence can be processed faster by a computer than with other fractional floating point representations. Fixed point numbers are converted to a string by casting the number to a int32_t data type, dividing by a float number of fractional values, and outputting the result using the floating point specifier (ie. %f) followed by the number of fractional bits.

Example:

int32_t i32 = biggest_char; printf("Largest Q4.4 = %f", i32, 4); 

The output is:

1. Largest Q4.4 = 7.937500 (0x0000007f)