/*
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"
*/
function formatDecimalWithZeros(num: number, width: number, decimals: number): string {
// Split into integer and fractional parts
const integer_part: number = Math.trunc(num);
const fractional_part: number = num - integer_part;
// Format integer part with leading zeros
const int_str: string = integer_part.toString().padStart(width, "0");
// Format fractional part (starts with "0.xxx")
const frac_str: string = fractional_part.toFixed(decimals);
// Remove the leading "0" before the decimal point
return int_str + frac_str.substring(1);
}
const num: number = 3.14159;
const result: string = formatDecimalWithZeros(num, 5, 5);
console.log("Original number:", num.toFixed(5));
console.log("Formatted string:", result);
/*
run:
Original number: 3.14159
Formatted string: 00003.14159
*/
