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When customizing the formatting of error messages or other dynamic text, it becomes necessary to pass a variable number of arguments to printf or sprintf. To address this problem, consider the following tailored solution:
The key lies in invoking the vfprintf function, which takes a variable number of arguments. Here's a code snippet showcasing its usage:
void Error(const char* format, ...) { va_list argptr; va_start(argptr, format); vfprintf(stderr, format, argptr); va_end(argptr); }
In this code, vfprintf outputs the formatted text to stderr. Alternatively, you can use vsnprintf to save the output in a string. Bear in mind that using vsprintf is discouraged due to its susceptibility to buffer overflows.
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