wcsrtombs() function in C/C++

wctob() function in C++

Last Updated : 14 Sep, 2018

wctob() function in C++ helps to convert a wide character wc into a single byte, if its if its multibyte character equivalent in the initial shift state is a single byte. Since, the function uses single byte encoding, hence is used for characters from ASCII character set . Syntax:

int wctob (wint_t wc);

Parameters: The above function accepts a single parameter as described below:

wc: This is the only parameter accepted by the wctob() function, it is the wide character needed to be narrowed/converted .

Return Type: The function returns a single byte representation of the wide character wc, if it corresponds to a multibyte character with a length of single byte in initial state. Otherwise, it returns EOF(End Of File). Below programs illustrate the above function: Program 1:

CPP

// Program illustrating
// wctob() function
#include <bits/stdc++.h>

// function implementing the wctob() function
int fun()
{

    int i, num;
    const wchar_t wc[] = L"priya lal";

    num = 0;
    for (i = 0; i < wcslen(wc); ++i)
        if (wctob(wc[i]) != EOF)
            ++num;

    // prints the numbers of characters
    // needed to be translated
    wprintf(L"wc has %d characters to be translated"
            "to single-byte characters.",
            num);
}

// Driver Program
int main()
{
    fun();
    return 0;
}

Output:

wc has 9 characters to be translatedto single-byte characters.

Program 2 :

CPP

// C++ program illustrating the wctob() function
#include <bits/stdc++.h>

// function implementing the wctob() function
void fun(wchar_t wc)
{

    int cn = wctob(wc);
    if (cn != EOF)

        printf("%#x translated to %#x\n", wc, cn);

    else

        printf("%#x could not be translated\n", wc);
}

// Driver Program
int main(void)
{
    char* utf_locale_present
        = setlocale(LC_ALL, "th_TH.utf8");

    // prints the result of the function
    puts("In Thai UTF-8 locale:");
    fun(L'a');
    fun(L'?');
}

Output:

In Thai UTF-8 locale:
0x61 translated to 0x61
0x3f translated to 0x3f

wcsrtombs() function in C/C++

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Article Tags :

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Practice Tags :

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