Check out example codes for "how to make floats output with 2 decimals c++". It will help you in understanding the concepts better.
Code Example 1
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
float x=10.3445f;
cout<<fixed<<setprecision(5)<<x<<endl;
cout<<fixed<<setprecision(2)<<x<<endl;
cout<<fixed<<setprecision(3)<<x<<endl;
cout<<fixed<<setprecision(0)<<x<<endl;
return 0;
}
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