Character conversion in QT

Convert int and long to Char and string in QT

 

Convert Char to qstring

Qstring Buf = qstring (qlatin1string (char); // convert Char to qstring

Qstring value: Char

Str. tostdstring (). c_str ()

 

For example, char tockenid [60];

Qstring STR = UI-> lineedit_gettokenid-> text ();

 

Strcpy (tockenid, str. tostdstring (). c_str ());

 

Conversion between qstring string int double char * AND OTHER TYPES

The following summarizes several types of mutual transfer methods I know:

 

1 qstring --> string

 

Qstring. tostdstring ();

 

2 string --> qstring

 

Qstring: fromstdstring (string)

 

3 qstring ---> int, double, char *

 

Qstring: toint ()

 

Qstring: todouble ()

 

Qstring. tostdstring (). c_str ();

 

4 int double char * ---> string

 

You can use stringstream in <sstream>

 

Taking int as an example, int A = 3;

 

Stringstream SS;

 

String strint;

 

SS <;

 

SS> strint;

 

The other two are the same.

 

5 Int double char * qstring

 

You can convert string to qstring. Another method is to view functions of the qstring class.

 

Qstring: Number () static function. The parameter can be Int or double.

 

6 conversion of double int

 

Static_cast

 

 

 

Qstring: Number (long N, int base = 10) [Static]

 

A convenient function that converts a number n to a string. N is represented Based on base. The default value is 10 and must be between 2 and 36.

 

Long A = 63;

 

Qstring STR = qstring: Number (A, 16); // STR = "3f"

 

Qstring STR = qstring: Number (A, 16). Upper (); // STR = "3f"

 

You can also refer to setnum ().

 

Example: Action/application. cpp, application/application. cpp, chart/chartform. cpp,

 

Fonts/simple-qfont-demo/Viewer. cpp, MDI/application. cpp, and SQL/Overview/extract/Main. cpp.

 

Qstring: Number (ulong N, int base = 10) [Static]

 

This is an overloaded member function that provides convenience. Its behavior is basically the same as that of the above function.

 

You can also refer to setnum ().

 

Qstring: Number (int n, int base = 10) [Static]

 

This is an overloaded member function that provides convenience. Its behavior is basically the same as that of the above function.

 

You can also refer to setnum ().

 

Qstring: Number (uint N, int base = 10) [Static]

 

This is an overloaded member function that provides convenience. Its behavior is basically the same as that of the above function.

 

A convenient manufacturing function that converts the number n to a string. N is represented Based on base. The default value is 10 and must be between 2 and 36.

 

You can also refer to setnum ().

Convert int and long to Char and string in QT

 

Convert Char to qstring

Qstring Buf = qstring (qlatin1string (char); // convert Char to qstring

Qstring value: Char

Str. tostdstring (). c_str ()

 

For example, char tockenid [60];

Qstring STR = UI-> lineedit_gettokenid-> text ();

 

Strcpy (tockenid, str. tostdstring (). c_str ());

 

Conversion between qstring string int double char * AND OTHER TYPES

The following summarizes several types of mutual transfer methods I know:

 

1 qstring --> string

 

Qstring. tostdstring ();

 

2 string --> qstring

 

Qstring: fromstdstring (string)

 

3 qstring ---> int, double, char *

 

Qstring: toint ()

 

Qstring: todouble ()

 

Qstring. tostdstring (). c_str ();

 

4 int double char * ---> string

 

You can use stringstream in <sstream>

 

Taking int as an example, int A = 3;

 

Stringstream SS;

 

String strint;

 

SS <;

 

SS> strint;

 

The other two are the same.

 

5 Int double char * qstring

 

You can convert string to qstring. Another method is to view functions of the qstring class.

 

Qstring: Number () static function. The parameter can be Int or double.

 

6 conversion of double int

 

Static_cast

 

 

 

Qstring: Number (long N, int base = 10) [Static]

 

A convenient function that converts a number n to a string. N is represented Based on base. The default value is 10 and must be between 2 and 36.

 

Long A = 63;

 

Qstring STR = qstring: Number (A, 16); // STR = "3f"

 

Qstring STR = qstring: Number (A, 16). Upper (); // STR = "3f"

 

You can also refer to setnum ().

 

Example: Action/application. cpp, application/application. cpp, chart/chartform. cpp,

 

Fonts/simple-qfont-demo/Viewer. cpp, MDI/application. cpp, and SQL/Overview/extract/Main. cpp.

 

Qstring: Number (ulong N, int base = 10) [Static]

 

This is an overloaded member function that provides convenience. Its behavior is basically the same as that of the above function.

 

You can also refer to setnum ().

 

Qstring: Number (int n, int base = 10) [Static]

 

This is an overloaded member function that provides convenience. Its behavior is basically the same as that of the above function.

 

You can also refer to setnum ().

 

Qstring: Number (uint N, int base = 10) [Static]

 

This is an overloaded member function that provides convenience. Its behavior is basically the same as that of the above function.

 

A convenient manufacturing function that converts the number n to a string. N is represented Based on base. The default value is 10 and must be between 2 and 36.

 

You can also refer to setnum ().