btowc() function in C/C++ with Examples
Last Updated :
13 Feb, 2023
The btowc() is a built-in function in C/C++ which converts a character to its wide character equivalent. It is defined within the cwchar header file of C++. Syntax:
wint_t btowc( int ch );
Parameter:The function accepts a single mandatory parameter ch which specifies the single byte character to convert to it’s wide character. Return Value: The function returns the wide character representation of ch if ch is a valid single byte character. If ch is EOF, WEOF is returned. Below programs illustrates the above function. Program 1:
CPP
#include <cstring>
#include <cwchar>
#include <iostream>
using namespace std;
int main()
{
char str[] = "Geeksfor\xf4\xdgeeks";
wchar_t wc;
int count = 0;
for ( int i = 0; i < strlen (str); i++) {
wc = btowc(str[i]);
if (wc != WEOF)
count++;
}
cout << count << " out of " << strlen (str)
<< " Characters were successfully widened";
return 0;
}
|
Output:
14 out of 15 Characters were successfully widened
Program 2:
CPP
#include <cstring>
#include <cwchar>
#include <iostream>
using namespace std;
int main()
{
char str[] = "Ishwar\xa1\xcGupta";
wchar_t wc;
int count = 0;
for ( int i = 0; i < strlen (str); i++) {
wc = btowc(str[i]);
if (wc != WEOF)
count++;
}
cout << count << " out of " << strlen (str)
<< " Characters were successfully widened";
return 0;
}
|
Output:
12 out of 13 Characters were successfully widened
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