formated string std::cout

Code Example:

#include <iostream>
#include <iomanip>

int main() {
    double value = 3.14159;
    std::cout << std::fixed << std::setprecision(2) << value << std::endl;
    return 0;
}

Explanation:

• Include Headers:
• The #include <iostream> directive includes the input/output stream library.

• The #include <iomanip> directive includes the input/output manipulator library.

• Main Function:

• The main function is the entry point of the program.

• Variable Declaration:

• A variable value of type double is declared and initialized with the value 3.14159.

• Output Formatting:

• std::fixed sets the floating-point numeric output to fixed-point notation.

• std::setprecision(2) sets the precision of the floating-point output to 2 decimal places.

• Output Statement:

• std::cout << ... << value << std::endl; outputs the formatted value to the standard output stream followed by a newline.

• Return Statement:

• return 0; indicates successful program termination.