How to calculate float value and then convert to uint8_t?

How to calculate float value and then convert to uint8_t?
As below, the current progress is 50, but overall just 50% completed, the correct value is 25, but I got 0.

#include <iostream>

using namespace std;

int main()
{
    uint8_t remaining = 1;
    uint8_t total = 2;
    uint8_t progress=50;
    float value=0;

    value = (float)(total-remaining)/total;
    progress = (uint8_t)value*progress;
    cout<<"value:"<<value<<endl;
    cout<<"progress:"<<(unsigned)progress<<endl;

    return 0;
}

The result are:

value:0.5
progress:0

How to get the correct 25?

>Solution :

The (C-style) cast has higher precedence than multiplication, so your progress = (uint8_t)value*progress statement is evaluated as progress = ( (uint8_t)value ) * progress;. Thus, the 0.5 in value (from the previous line) will be truncated to zero.

You need to put the multiplication in parentheses. Also, try to avoid using C-style casts:

progress = static_cast<uint8_t>(value * progress);