Question

well basically if I write something like this –

float a = 0;
a = (float) 1/5;
a += (float) 1/9;
a += (float) 1/100;

It will automatically decrase precision to 2 digits after comma, but I need to have 5 digits after comma, is it available to create, so it displays 5 digits? With setprecision(5) it, just shows 00000 after comma.

It get’s all data from input file just fine.

Answer 1

this will give 5 digits after comma:

#include <iostream>
#include <iomanip>

using namespace std;

int main(int argi, char** argc) {
       float a = 0;
       a = (float) 1/5;
        a += (float) 1/9;
        a += (float) 1/100;

        cout << setprecision(5) << a << endl;
        return 0;
}

if you want to have always 5 digits on output, maybe use this:

cout << setprecision(5) << setfill ('0')<< setw(5) << a << endl;