Borland C ++ builder VCL numeric Conversion Function

V. Borland C ++ builder VCL numeric Conversion Function

1. inttostr
Converts an integer to an ansistring. The function prototype is as follows:
Ansistring _ fastcall inttostr (INT value );

2. inttohex
Converts an integer to a hexadecimal string. The function prototype is as follows:
Ansistring _ fastcall inttohex (INT value, int digits );

3. strtoint
The ansistring is converted to an integer. If the ansistring cannot be converted, an econverterror exception occurs,
The function prototype is as follows:
Int _ fastcall strtoint (const ansistring S );

4. strtointdef
Converts an ansistring string to a numeric value. The function prototype is as follows:
Int _ fastcall strtointdef (const system: ansistring S, int default );

5. floattostr
Converts a floating point number to an ansistring. The function prototype is as follows:
Ansistring _ fastcall floattostr (Extended value );

6. strtofloat
Converts an ansistring string to a floating point value. The function prototype is as follows:
Extended _ fastcall strtofloat (const ansistring S );

7. floattostrf
Converts a floating point number to an ansistring in the specified format. The function prototype is as follows:
Ansistring _ fastcall floattostrf (Extended value, tfloatformat format, int precision, int digits );

Vi. Borland C ++ builder VCL Time Functions

1. Date
The returned tdatetime object contains the current year, month, and day information. The function prototype is as follows:
System: tdatetime _ fastcall date (void );

2. Time
The returned tdatetime object contains the current time information. The function prototype is as follows:
System: tdatetime _ fastcall time (void );

3. Now
Returns the tdatetime object to obtain the current date and time information. The function prototype is as follows:
System: tdatetime _ fastcall now (void );

4. datetimetostring
Converts a tdatetime object to a string object in the specified format. The function prototype is as follows:
Void _ fastcall datetimetostring (ansistring &; Result, const ansistring format, system: tdatetime datetime );

5. datetostr
Convert the tdatetime object (including the current year, month, and day information) to a string object. The function prototype is as follows:
Ansistring _ fastcall datetostr (System: tdatetime date );

6. timetostr
Converts the current date to a string object. The function prototype is as follows:
Ansistring _ fastcall timetostr (System: tdatetime time );

7. datetimetostr
Convert a tdatetime object to a string object. The function prototype is as follows:
Ansistring _ fastcall datetimetostr (System: tdatetime datetime );

8. strtodate
Converts a String object to a year, month, or day object. The function prototype is as follows:
System: tdatetime _ fastcall strtodate (const ansistring S );

9. strtotime
Converts a String object to a time object. The function prototype is as follows:
System: tdatetime _ fastcall strtotime (const ansistring S );

10. strtodatetime
Converts a String object to an object of year, month, day, and time. The function prototype is as follows:
System: tdatetime _ fastcall strtodatetime (const ansistring S );

11. datetimetosystemtime
Convert the tdatetime object to the operating system time. The function prototype is as follows:
Void _ fastcall datetimetosystemtime (System: tdatetime datetime, _ systemtime &; systemtime );

12. systemtimetodatetime
Convert the operating system time to a tdatetime object. The function prototype is as follows:
System: tdatetime _ fastcall systemtimetodatetime (const _ systemtime &; systemtime );

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