vsprintf example

Transferred from: http://blog.csdn.net/anye3000/article/details/6593551Programmers with a history of C writing tend to like the printf function in particular. Even though simpler commands (such as puts) can be used, printf appears in the "hello of

Printf and sprintf are common and vsprintf is not. 1. Declaration of the three functions: int printf (const char * szFormat, ...);int sprintf (char * szBuffer, const char * szFormat, ...);int vsprintf(char *string, char *format, va_list param); 2.

Instance Write the formatted string to the variable: Definition and usage The vsprintf () function writes a formatted string to a variable. Unlike sprintf (), the parameters in vsprintf () are in the array. The array elements are inserted into the

vsprintf 　　/* Function Name: vsprintf function: Send formatted output to string return value: Normally returns the length of the generated string (minus/0), and error conditions return negative usage: int vsprintf (char *string, Char *format,

The sprintf () format string is written to a variable.vsprintf () format the string in some of the write variables. Output: 123.000000456.000000　　Grammar sprintf(format,arg1,arg2,arg+ +) Parameters

I. vfprintf Function Name: vfprintf Function: formatted data is output to the specified data stream. Usage: int vfprintf (File * stream, char * format, va_list PARAM ); Function Description: vfprintf () will convert and format the data according to

Va_start,Function name, the process of reading a variable parameter is actually in the stack, using pointers, traversing the parameter list in the stack segment, from the low address to the high address one by one to read out the contents of the

Before this time, I always believe building the program with Unicode or non Unicode flag only effect the programatic side, and won't effect the system behavior. the problem arose with mixing usage of Multi-byte and Unicode Character Set

Vprintf, vfprintf, and vsprintf Syntax: # Include # include int vprintf (char * format, va_list arg_ptr); int vfprintf (File * stream, const char * format, va_list arg_ptr); int vsprintf (char * buffer, char * format, va_list

Study the implementation of printf. First, let's look at the function body of the printf function.Int printf (const char * fmt ,...){Int I;Char buf [256];Va_list arg = (va_list) (char *) (& fmt) + 4 );I = vsprintf (buf, fmt, arg );Write (buf, I