How to use setprecision in C++

Question

I am new in C++ , i just want to output my point number up to 2 digits. just like if number is 3.444, then the output should be 3.44 o

Answer 1

#include 
#include 

int main()
{
    double num1 = 3.12345678;
    std::cout << std::fixed << std::showpoint;
    std::cout << std::setprecision(2);
    std::cout << num1 << std::endl;
    return 0;
}