vsprintf — Format a string and place it in a buffer


int vsprintf (char * buf,
 const char * fmt,
 va_list args);


char * buf

The buffer to place the result into

const char * fmt

The format string to use

va_list args

Arguments for the format string


The function returns the number of characters written into buf. Use vsnprintf or vscnprintf in order to avoid buffer overflows.

If you're not already dealing with a va_list consider using sprintf.

See the vsnprintf documentation for format string extensions over C99.