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c32rtomb() function in C/C++?
In C++, we can use 32-bit character representations. The c32rtomb() function is used to convert 32-bit character representation to narrow multi-byte character representation. We can find this function inside the uchar.h header file.
This function takes three parameters. These are −
- The string where multi-byte character will be stored
- 32-bit character to convert
- The pointer of type mbstate_t object. which is used to interpret multibyte string.
This function returns number of bytes written to the character array, when it is successful, otherwise returns -1. Let us see an example to get better idea.
Example
#include <iostream>
#include <uchar.h>
#include <wchar.h>
using namespace std;
int main() {
const char32_t myStr[] = U"Hello World";
char dest[50];
mbstate_t p{};
size_t length;
int j = 0;
while (myStr[j]) {
length = c32rtomb(dest, myStr[j], &p); //get length from c32rtomb() method
if ((length == 0) || (length > 50))
break;
for (int i = 0; i < length; ++i)
cout << dest[i];
j++;
}
}Output
Hello World
Updated on: 30-Jul-2019
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