LInux下使用mbstowcs函数可以将char转化为wchar_t
函数含义：convert a multibyte string to a wide char string
说明： The behaviour of mbstowcs depends on the LC_CTYPE category of the current locale
返回值： The mbstowcs() function returns the number of wide characters that make up the converted part of the wide-char-acter string, not including the terminating null wide character. If an invalid multibyte sequence was encountered, (size_t) -1 is returned.
1 #include <string.h> 2 #include <stdio.h> 3 #include <stdlib.h> 4 #include <wchar.h> 5 #include <locale.h> 6 #include <iostream> 7 using namespace std; 10 // 将char类型转化为wchar13 // locale: 环境变量的值，mbstowcs依赖此值来判断src的编码方式
11 int ToWchar(char* &src, wchar_t* &dest, const char *locale = "zh_CN.utf8"){ 18 if (src == NULL) { 19 dest = NULL; 20 return 0; 21 } 23 //根据环境变量设置locale 24 setlocale(LC_CTYPE, locale); 26 //得到转化为需要的宽字符大小 27 int w_size = mbstowcs(NULL, src, 0) + 1; 29 //w_size=0说明mbstowcs返回值为-1。即在运行过程中遇到了非法字符(很有可能使locale没有设置正确) 31 if (w_size == 0) { 32 dest = NULL; 33 return -1; 34 } 36 wcout << "w_size" << w_size << endl; 37 dest = new wchar_t[w_size]; 38 if (!dest) return -1; 42 int ret = mbstowcs(dest, src, strlen(src)+1); 43 if (ret <= 0)return -1;46 return 0; 47 } 49 int main(){ 51 char* str = "中国123"; 52 wchar_t *w_str ; 53 ToWchar(str,w_str); 54 wcout << w_str[0] << "--" << w_str[1] << "--" << w_str[2]; 55 delete(w_str); 56 return 0; 57 }
1 #include <stdio.h> 2 3 int main(void){ 5 int i_number, result; 6 float f_number; 7 char c_number, str[81]; 8 wchar_t wc_str, ws_str[81]; 10 printf( " Enter an int, a float, two chars and two strings "); 12 result = scanf( "%d %f %c %C %s %S",
&i_number, &f_number, &c_number, &wc_str, str, ws_str ); 13 printf( " The number of fields input is %d ",
result ); 14 printf( "The contents are: %d %f %c %C %s %S ",
i_number, f_number, c_number, wc_str, str, ws_str); 16 wprintf( L" Enter an int, a float, two chars and two strings "); 18 result = wscanf( L"%d %f %hc %lc %S %ls",
&i_number, &f_number, &c_number, &wc_str, str, ws_str ); 19 wprintf( L" The number of fields input is %d ",
result ); 20 wprintf( L"The contents are: %d %f %C %c %hs %s ",
i_number, f_number, c_number, wc_str, str, ws_str); 21 }