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c:stdio.h:vscanf

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c:stdio.h:vscanf [2013/01/22 22:02] (current)
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 +{{keywords>wiki library source code example reference}}
 +====== vscanf ======
 +<code c>
 +int vscanf(char * restrict format, va_list arg_ptr); 
 +</code>
  
 +=== description ===
 +The functions vscanf(), vfscanf(), and vsscanf() are functionally equivalent to scanf(), fscanf(), and sscanf(), respectively, except that the argument list has been replaced by a pointer to a list of arguments.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 .
 +
 +===== example =====
 +<code c>
 +#include <stdio.h>
 +#include <stdarg.h>
 +
 +  void get_message(char *format, ...)
 +  {
 +    va_list ptr;
 +
 +    va_start(ptr, format);
 +
 +    vscanf(format, ptr);
 +
 +    va_end(ptr);
 +  }
 +
 +  int main(void)
 +  {
 +
 +    int i;
 +    printf("integer:");
 +    get_message(" %d ", &i);
 +
 +    printf("%d", i);
 +
 +    return 0;
 +  }
 +</code>
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c/stdio.h/vscanf.txt · Last modified: 2013/01/22 22:02 (external edit)

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