Generate random float between two floats

Question

I know this is a rather simple question, but I'm just not too good at maths.

I know how to generate a random float between 0 and 1:

float random = ((float) rand()) / (float) RAND_MAX; 

• But what, if I want a function that given a range of two floats, returns a pseudorandom float in that range?

Example:

RandomFloat( 0.78, 4.5 ); //Could return 2.4124, 0.99, 4.1, etc. 

Answer 1

float RandomFloat(float a, float b) {     float random = ((float) rand()) / (float) RAND_MAX;     float diff = b - a;     float r = random * diff;     return a + r; } 

This works by returning a plus something, where something is between 0 and b-a which makes the end result lie in between a and b.