Question

How would you change the precision of a number for example: float n = 1.2345 and store it back to the variable ‘n’ with changing it to 1.23 ?

Answer 1

float n = 1.2345;
int scaled = n * 100
n = static_cast<float>(scaled)/100.0;

or in one line:

n = static_cast<float>( static_cast<int>(n*100) ) / 100;