#include <iomanip>
#include <iostream>
int main()
{
double num1 = 3.12345678;
double num = 3;
std::cout << num1 << std::endl;
std::cout << std::setprecision(5) << num1 << std::endl;
std::cout << std::fixed << std::setprecision(5) << num << std::endl;
std::cout << num << std::endl;
return 0;
}
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