CString str; str.FormatV("Hello %s!", "World");
CString str; str.FormatV("Name: %s, Age: %d", "John", 35);
void printArgs(const char* fmt, ...) { va_list args; va_start(args, fmt); CString str; str.FormatV(fmt, args); va_end(args); printf("%s\n", (LPCTSTR)str); } printArgs("Today is %s, the %d%s of %s %d.", "Saturday", 12, "th", "June", 2021);This code defines a function called `printArgs` that takes a format string and a variable number of arguments. It uses the `va_list`, `va_start`, `va_end`, and `LPCTSTR` macros to handle variable arguments and convert the CString object to a null-terminated string. The function then prints the resulting string to the console. The example then calls `printArgs` with the format string "Today is %s, the %d%s of %s %d." and five variable arguments: "Saturday", 12, "th", "June", and 2021. The resulting string will be "Today is Saturday, the 12th of June 2021.". In conclusion, CString FormatV is part of the MFC library in C++ and is used to format a string with a variable number of arguments. It is similar to the printf function and can handle various types of arguments, including strings, integers, and floating-point numbers.