The **`wctomb` function** converts a wide character to a multi-byte character.
To use the `wctomb` function, the `cstdlib` header file needs to be included in the program, as shown below:
```C++
#include <cstdlib>
```

# Prototype
The prototype of the `wctomb()` function is as follows:
```C++
int wctomb(char* pointerMb, wchar_t wc);
```
The function takes two arguments and returns an integer value. It stores the return value at the memory location that is pointed by `pointerMb` and stores a maximum of `MB_CUR_MAX` characters.

# Parameters
It takes two values as arguments:

1. `pointerMb`: pointer to the resulting multi-byte character

2. `wc`: wide character 

# Return value
It returns different values based on whether `pointerMb` is `Null` or not. The return values are represented in the figure below:


# Example 1
The following code explains the use of the `wctomb` function in C++ when the value of `pointerMb` is `NULL`:

#include <iostream>
#include <cstdlib>
using namespace std;

int main() {
  
  wchar_t wc_valid = L'x';
  char *pointerMb = NULL;
	int returnValue;
  
  returnValue = wctomb(pointerMb, wc_valid);
  cout << "PointerMb = NULL:" << endl;
  cout << "Return Value: " << returnValue << endl;
  

  return 0;
}

# Example 2
The following code explains the use of the `wctomb` function in C++ when the value of `pointerMb` is not `NULL`:

#include <iostream>
#include <cstdlib>
using namespace std;

int main() {
  
  wchar_t wc_valid = L'x';
	char *pointerMb = (char*)malloc(sizeof(char));
	int returnValue;
  
  returnValue = wctomb(pointerMb, wc_valid);
  cout << "PointerMb != NULL and wc = valid:" << endl;
  cout << "Return Value: " << returnValue << endl;
  
  
  return 0;
}

How to use wctomb() in C++ 

The wctomb function converts a wide character to a multi-byte character. To use the wctomb function, the cstdlib header file needs to be included in the program, as shown below: #include   