C++ Format Output to 2 Decimal Places

To display two decimal places in C++, you can use the setprecision function from the iomanip header file. Here is a simple example:

#include <iostream>
#include <iomanip>

int main() {
    double num = 3.14159;

    std::cout << std::fixed << std::setprecision(2) << num << std::endl;

    return 0;
}

In the above example, using std::fixed specifies the use of fixed-point decimal format, while std::setprecision(2) specifies retaining two decimal places. Running this code will output 3.14.