using System;
public class Program
{
/*
format_decimal_with_zeros
-------------------------
Converts a floating‑point number into a fixed‑length string with
leading zeros on the integer part.
Parameters:
num - the decimal number to format
width - total width of the integer part (zero‑padded)
decimals - number of digits after the decimal point
Returns:
A formatted string such as "00003.14159"
Example:
num = 3.14159, width = 5, decimals = 5
Output → "00003.14159"
*/
static string formatDecimalWithZeros(double num, int width, int decimals) {
// Split into integer and fractional parts
int integer_part = (int)Math.Truncate(num);
double fractional_part = num - integer_part;
// Format integer part with leading zeros
string int_str = integer_part.ToString().PadLeft(width, '0');
// Format fractional part (starts with "0.xxx")
string frac_str = fractional_part.ToString("F" + decimals);
// Remove the leading "0" before the decimal point
return int_str + frac_str.Substring(1);
}
public static void Main(string[] args)
{
double num = 3.14159;
string result = formatDecimalWithZeros(num, 5, 5);
Console.WriteLine("Original number: " + num.ToString("F5"));
Console.WriteLine("Formatted string: " + result);
}
}
/*
run:
Original number: 3.14159
Formatted string: 00003.14159
*/
