Difference between _ttof, atof, _atof_l, _wtof, _wtof_l in C++ and C?

Here's the translation and explanation of the differences between _ttof, atof, _atof_l, _wtof, and _wtof_l in C++ and C, focusing on string conversion functions:

1. Key Functions:
2. Example Usage:
3. Explanation:
4. Notes:

1.) Key Functions:

2.) Example Usage:

#include <tchar.h>
#include <cstdlib>
#include <cwchar>
#include <locale>
 
// Conversion from CString to int
CString strText = _T("123");
int n = _ttoi(strText);  // Convert to an integer
// Result: n = 123
 
// Conversion from CString to double
CString strText = _T("123.456");
 
// Convert to a floating-point number
double d = _ttof(strText);  
// Result: d = 123.456
 
// Conversion using atof
// Convert to double
double atofValue = atof("33.364"); 
// Result: atofValue = 33.364
 
// Conversion using _wtof
// Convert wide-character string to double
double wideValue = _wtof(L"333.64");  
// Result: wideValue = 333.64
 
// Conversion with locale settings
// Set locale to German
setlocale(LC_NUMERIC, "de_DE"); 
// Convert with German decimal separator
double germanValue = atof("123,456");  
// Result: germanValue = 123.456
 
// Conversion with locale settings using _atof_l
// French locale
locale_t frenchLocale = newlocale(LC_ALL_MASK, "fr_FR", (locale_t)0);  
// Convert with French decimal separator
double frenchValue = _atof_l(" -2,309e-25", frenchLocale);  
// Result: frenchValue = -2.309e-25
 

3.) Explanation:

4.) Notes: