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| 22.40.1.vprintf, vfprintf, vsprintf, and vsnprintf |
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| Item | Value | | Header file | stdarg.h
stdio.h | | Declaration | int vprintf(char *format, va_list arg_ptr);
int vfprintf(FILE *stream, const char *format, va_list arg_ptr);
int vsprintf(char *buf, const char *format, va_list arg_ptr);
int vsnprintf(char * restrict buf, size_t num, const char * restrict format, va_list arg_ptr);
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The functions vprintf(), vfprintf(), vsprintf(), and vsnprintf() are functionally equivalent to
printf(), fprintf(), sprintf(), and snprintf(), respectively
, except that the argument list has been replaced by a pointer to a list of arguments. |
This pointer must be of type va_list, which is defined in the header . |
#include <stdio.h>
#include <stdarg.h>
void print_message(char *format, ...)
{
va_list ptr;
va_start(ptr, format);
vprintf(format, ptr);
va_end(ptr);
}
int main(void)
{
print_message("Cannot open file %s.", "test");
return 0;
}
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| 22.40.vprintf vfprintf vsprintf vsnprintf | | 22.40.1. | vprintf, vfprintf, vsprintf, and vsnprintf | | |
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