import Foundation
/*
Digital storage conversion table:
Each unit is a power of 1024 relative to bytes.
Bytes (B) = 1024^0
Kilobytes (KB) = 1024^1
Megabytes (MB) = 1024^2
Gigabytes (GB) = 1024^3
Terabytes (TB) = 1024^4
Petabytes (PB) = 1024^5
Exabytes (EB) = 1024^6
Zettabytes (ZB)= 1024^7
Yottabytes (YB)= 1024^8
*/
// Convert any unit to bytes using its exponent
func toBytes(_ value: Double, exponent: Int) -> Double {
// 1024^exponent gives the multiplier for the unit
value * pow(1024.0, Double(exponent))
}
// Convert bytes to any unit using its exponent
func fromBytes(_ bytes: Double, exponent: Int) -> Double {
bytes / pow(1024.0, Double(exponent))
}
// Print all conversions from a given byte value
func printAll(_ bytes: Double) {
let names = [
"Bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"
]
for (exp, name) in names.enumerated() {
let converted = fromBytes(bytes, exponent: exp)
print(String(format: "%8@: %.6f", name, converted))
}
}
print("Digital Storage Unit Converter\n")
print("Enter value: ", terminator: "")
guard let valueInput = readLine(),
let value = Double(valueInput.trimmingCharacters(in: .whitespaces)) else {
print("Invalid value.")
exit(1)
}
print("Enter unit (B, KB, MB, GB, TB, PB, EB, ZB, YB): ", terminator: "")
guard let unit = readLine()?.trimmingCharacters(in: .whitespaces) else {
print("Invalid unit.")
exit(1)
}
// Map unit string to exponent
let exponent: Int = {
switch unit {
case "B": return 0
case "KB": return 1
case "MB": return 2
case "GB": return 3
case "TB": return 4
case "PB": return 5
case "EB": return 6
case "ZB": return 7
case "YB": return 8
default:
print("Unknown unit.")
exit(1)
}
}()
// Convert input to bytes
let bytes = toBytes(value, exponent: exponent)
// Print all conversions
print("\nConverted values:")
printAll(bytes)
/*
run:
Digital Storage Unit Converter
Enter value: 8
Enter unit (B, KB, MB, GB, TB, PB, EB, ZB, YB): TB
Converted values:
Bytes: 8796093022208.000000
KB: 8589934592.000000
MB: 8388608.000000
GB: 8192.000000
TB: 8.000000
PB: 0.007812
EB: 0.000008
ZB: 0.000000
YB: 0.000000
*/
