forked from airat77786/MQL5Book
52 lines
2.2 KiB
MQL5
52 lines
2.2 KiB
MQL5
 | //+------------------------------------------------------------------+
| ||
//| ConversionNumbers.mq5 |
| |||
//| Copyright 2021, MetaQuotes Ltd. |
| |||
//| https://www.mql5.com |
| |||
//+------------------------------------------------------------------+
| |||
| |||
#define PRT(A) Print(#A, "=", (A))
| |||
#define PRT2(A) Print(#A, "='", (A), "'")
| |||
| |||
//+------------------------------------------------------------------+
| |||
//| Script program start function |
| |||
//+------------------------------------------------------------------+
| |||
void OnStart()
| |||
{
| |||
const string text = "123.4567890123456789";
| |||
const string message = "-123e-5 buckazoid";
| |||
const double number = 123.4567890123456789;
| |||
const double exponent = 1.234567890123456789e-5;
| |||
| |||
// typecasts
| |||
PRT((double)text); // 123.4567890123457
| |||
PRT((double)message); // -0.00123
| |||
PRT((string)number); // 123.4567890123457
| |||
PRT((string)exponent);// 1.234567890123457e-05
| |||
PRT((long)text); // 123
| |||
PRT((long)message); // -123
| |||
| |||
// conversions
| |||
PRT(StringToDouble(text)); // 123.4567890123457
| |||
PRT(StringToDouble(message)); // -0.00123
| |||
| |||
// by default, 8 digits in fractional part
| |||
PRT(DoubleToString(number)); // 123.45678901
| |||
| |||
// customized accuracy
| |||
PRT(DoubleToString(number, 5)); // 123.45679
| |||
PRT(DoubleToString(number, -5)); // 1.23457e+02
| |||
PRT(DoubleToString(number, -16));// 1.2345678901234568e+02
| |||
PRT(DoubleToString(number, 16)); // 123.4567890123456807
| |||
// last 2 digits are unreliable!
| |||
PRT(MathSqrt(-1.0)); // -nan(ind)
| |||
PRT(DoubleToString(MathSqrt(-1.0))); // 9223372129088496176.54775808
| |||
| |||
PRT(StringToInteger(text)); // 123
| |||
PRT(StringToInteger(message)); // -123
| |||
| |||
PRT2(IntegerToString(INT_MAX)); // '2147483647'
| |||
PRT2(IntegerToString(INT_MAX, 5)); // '2147483647'
| |||
PRT2(IntegerToString(INT_MAX, 16)); // ' 2147483647'
| |||
PRT2(IntegerToString(INT_MAX, 16, '0'));// '0000002147483647'
| |||
}
| |||
//+------------------------------------------------------------------+
|