我创建了一个程序，将实数转换为美元，并且浮点变量不正确[关闭]

Question

我创建了一个程序，将真实（巴西硬币）转换为美元，硬币是4位数，浮动变量更多：

#include <iostream>

using namespace std;

int main(int nNumberofArgs, char* pszArgs[]){
float fReal;
cout << "enter the cash in real: R$:";
cin >> fReal;
float fDollar = fReal / 3.90;
cout << "your cash in dollar(s): " << fDollar << endl; // Here i want 
//:.2f(from python) to the dollar value
cout << "Press enter to continue..." << endl;
cin.ignore(10, '\n');
cin.get();
return 0;
}

Answer 1

std::cout << std::setprecision(2)<< fDollar<<'\n';