示例

下面的示例使用 fgetwc 子例程从文件中读取宽字符代码：

#include <stdio.h>
#include <locale.h>
#include <stdlib.h>
 
main()
{
    wint_t  retval;
    FILE    *fp;
    wchar_t *pwcs;
  
    (void)setlocale(LC_ALL, "");
  
    /*
    **  Open a stream.
    */
    fp = fopen("file", "r");
  
    /*
    **  Error Handling if fopen was not successful.
    */
    if(fp == NULL){
        /*  Error handler  */
    }else{
        /*
        **  pwcs points to a wide character buffer of BUFSIZ.
        */
        while((retval = fgetwc(fp)) != WEOF){
            *pwcs++ = (wchar_t)retval;
               /*  break when buffer is full  */
        }
    }
    /*  Process the wide characters in the buffer  */
}

下面的示例使用 getwchar 子例程从标准输入中读取宽字符：

#include <stdio.h>
#include <locale.h>
#include <stdlib.h>
 
 main()
{
    wint_t  retval;
    FILE    *fp;
    wchar_t *pwcs;
 
    (void)setlocale(LC_ALL, "");
 
    index = 0;
    while((retval = getwchar()) != WEOF){
        /*  pwcs points to a wide character buffer of BUFSIZ.  */
        *pwcs++ = (wchar_t)retval;
        /*  break on buffer full  */
    }
    /*  Process the wide characters in the buffer  */
}

下面的示例使用 ungetwc 子例程将宽字符压入输入流：

#include <stdio.h>
#include <locale.h>
#include <stdlib.h>
 
main()
{
    wint_t  retval;
    FILE    *fp;
 
    (void)setlocale(LC_ALL, "");
    /*
    **  Open a stream.
    */
    fp = fopen("file", "r");
 
    /*
    **  Error Handling if fopen was not successful.
    */
    if(fp == NULL){
        /*  Error handler  */
 
    else{
        retval = fgetwc(fp);
        if(retval != WEOF){
            /*
            **  Peek at the character and return it to the stream.
            */
            retval = ungetwc(retval, fp);
            if(retval == EOF){
                /*  Error on ungetwc  */
            }
        }
    }
}

下面的示例使用 fgetws 子例程读取文件，一次读一行：

#include <stdio.h>
#include <locale.h>
#include <stdlib.h>
 
main()
{
    FILE    *fp;
    wchar_t *pwcs;
 
    (void)setlocale(LC_ALL, "");
 
    /*
    **  Open a stream.
    */
    fp = fopen("file", "r");
 
    /*
    **  Error Handling if fopen was not successful.
    */
    if(fp == NULL){
        /*  Error handler  */
    }else{
        /*  pwcs points to wide character buffer of BUFSIZ.  */
        while(fgetws(pwcs, BUFSIZ, fp) != (wchar_t *)NULL){
            /*
            **  pwcs contains wide characters with null
            **  termination.
            */
        }
    }
}

下面的示例使用 fputwc 子例程将宽字符写入输出流：

#include <stdio.h>
#include <locale.h>
#include <stdlib.h>
 
main()
{
    int     index, len;
    wint_t  retval;
    FILE    *fp;
    wchar_t *pwcs;
 
    (void)setlocale(LC_ALL, "");
 
    /*
    **  Open a stream.
    */
    fp = fopen("file", "w");
 
    /*
    **  Error Handling if fopen was not successful.
    */
    if(fp == NULL){
        /*  Error handler  */
    }else{
        /*  Let len indicate number of wide chars to output.
        **  pwcs points to a wide character buffer of BUFSIZ.
        */
        for(index=0; index < len; index++){
            retval = fputwc(*pwcs++, fp);
            if(retval == WEOF)
                break;  /*  write error occurred  */
                        /*  errno is set to indicate the error. */
        }
    }
}

下面的示例使用 fputws 子例程将宽字符字符串写入文件：

#include <stdio.h>
#include <locale.h>
#include <stdlib.h>
 
main()
{
    int     retval;
    FILE    *fp;
    wchar_t *pwcs;
 
    (void)setlocale(LC_ALL, "");
 
    /*
    **  Open a stream.
    */
    fp = fopen("file", "w");
 
    /*
    **  Error Handling if fopen was not successful.
    */
    if(fp == NULL){
        /*  Error handler  */
 
    }else{
        /* 
        **  pwcs points to a wide character string
        **  to output to fp.
        */
        retval = fputws(pwcs, fp);
        if(retval == -1){
            /*  Write error occurred                */
            /*  errno is set to indicate the error  */
        }
    }
}