mbtowc function in C

The C library function int mbtowc(whcar_t *pwc, const char *str, size_t n) converts a multibyte sequence to a wide character.

Following is the declaration for mbtowc() function.

int mbtowc(whcar_t *pwc, const char *str, size_t n)

The parameters are −

• pwc − This is the pointer to an object of type wchar_t.

• str − This is the pointer to the first byte of a multi-byte character.

• str − This is the pointer to the first byte of a multi-byte character.

• n −This is the maximum number of bytes to be checked for character length.

The return values are −

• If str is not NULL, the mbtowc() function returns the number of consumed bytes starting at str, or 0 if s points to a null byte, or -1 upon failure.

• If str is NULL, the mbtowc() function returns non-zero if the encoding has non-trivial shift state, or zero if the encoding is stateless.

Example

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main () {
   char *str = "This is tutorialspoint.com";
   wchar_t mb[100];
   int len;
   len = mblen(NULL, MB_CUR_MAX);
   mbtowc(mb, str, len*strlen(str) );
   wprintf(L"%ls 
", mb );
   return(0);
}

Output

???

Smita Kapse

Updated on: 30-Jul-2019

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