#include <stdio.h>

 #include <stdarg.h>

 int myself_printf(char *format, ...)

 {

     va_list ap;

     int n;

     va_start(ap, format);

     n = vprintf(format, ap);

     va_end(ap);

     return n;

 }

 int main(void)

 {

     myself_printf("test_num : %d\n", );

 }

 #include <stdio.h>

 #include <stdarg.h>

 int myself_error(char *format, ...)

 {

     va_list ap;

     char *str;

     int n;

     va_start(ap, format);

     fprintf(stderr, "Error: ");

     vfprintf(stderr, format, ap);

     va_end(ap);

     return n;

 }

 int main(void)

 {

     myself_error("%s\n", "main failure");

 }

 #include <stdio.h>

 #include <stdarg.h>

 void foo(char *format, ...)

 {

     va_list ap;

     char c, *s;

     int d;

     va_start(ap, format);

     while (*format) {

         switch (*format++) {

             case 's':    /* string */

                 s = va_arg(ap, char *);

                 printf("string :%s\n", s);

                 break;

             case 'd':

                 d = va_arg(ap, int);

                 printf("int :%d\n", d);

                 break;

             case 'c':

                 c = (char) va_arg(ap, int);

                 printf("char :%c\n", c);

                 break;

         }

         va_end(ap);

     }

 }

 int main(void)

 {

     char c = 'b';

     foo("dc", "a", , c);

 }

 #include <stdio.h>

 #include <stdarg.h>

 void foo(int n, ...)

 {

     va_list ap;

     int tmp, i;

     va_start(ap, n); 

     for (i = ; i < n; i++) {

         tmp = va_arg(ap, int);

         printf("tmp : %d\n", tmp);

     }   

     va_end(ap);

 }

 int main(void)

 {

     foo(, "", , , );

 }

 #include <stdio.h>

 void foo(int n, ...)

 {

     int *temp = &n;

     int i = ;

     temp++;

     for (i = ; i < n; i++) {

         printf("temp : %d\n", *temp);

         temp++;

     }

 }

 int main(void)

 {

     foo(, , , , );

 }

 #include <stdio.h>

 #include <stdarg.h>

 void foo(char *format, ...)

 {

     va_list ap;

     char *res;

     va_start(ap, format);

     res = va_arg(ap, char *);

     printf("va_arg result : %s\n", res);

     printf("%s%s\n", format, res);

     va_end(ap);

 }

 int main(void)

 {

     foo("test : ", "foo");

 }

 #include <stdio.h>

 #include <stdarg.h>

 void testFun(char *a, int b, char *c, ...)

 {

     va_list ap; 

     va_start(ap, c); 

     vsnprintf(a, b, c, ap);

     printf("a : %s\n", a); 

     va_end(ap);

 }

 int main(void)

 {

     char buf[];

     testFun(buf, , "def");

 }