c++ print number not in scientific notation

To print a number in C++ without scientific notation, you can use the std::fixed modifier along with std::cout. Here are the steps to achieve this:

1. Include the necessary header file: #include <iostream> - This includes the standard input/output stream library, which provides the std::cout object for displaying output.

2. Use the std::cout object to print the number: std::cout << std::fixed << number; - The std::cout object is used to display output, and the std::fixed modifier ensures that the number is printed without scientific notation.

3. End the line: std::cout << std::endl; - This ends the line of output and moves the cursor to the next line.

Here's an example that demonstrates these steps:

#include <iostream>

int main() {
    double number = 123456789.123456789;

    std::cout << std::fixed << number << std::endl;

    return 0;
}

This example declares a variable number of type double and assigns it a value. Using std::cout, the value of number is printed without scientific notation. The output will be 123456789.123457.

Note that the std::fixed modifier will affect all subsequent floating-point output until another modifier, such as std::scientific, is used.