C ++ data type conversion skills

1. Convert the string to an integer:

Function category:

Double atof (const char * string );

Double _ wtof (const wchar_t * string );

Int atoi (const char * string );

_ Int64 atoi (const char * string );

Int _ wtoi (const wchar_t * string );

_ Int64 _ wtoi64 (const wchar_t * string );

Long atol (const char * string );

Long _ wtol (const wchar_t * string );

 

 

2. convert other data types to strings

Function category:

2.1 int to string:

Char * _ ITOA (INT value, char * string, int Radix );

Char * _ i64toa (_ int64 value, char * string, int Radix );

Char * _ ui64toa (unsigned _ int64 value, char * string, int Radix );

Wchar_t * _ itow (INT value, wchar_t * string, int Radix );

Wchar_t * _ i64tow (_ int64 value, wchar_t * string, int Radix );

Wchar_t * _ ui64tow (unsigned _ int64 value, wchar_t * string, int Radix );

 

2.2 long to a string:

Char * ltoa (long value, char * string, int Radix );

Wchar_t * ltow (long value, wchar_t * string, int Radix );

 

2.3 double conversion to a string:

Char * _ fcvt (double value, int count, int * Dec, int * sign );