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| /* va_copy example */ #include <stdio.h> /* printf, vprintf*/ #include <stdlib.h> /* malloc */ #include <string.h> /* strlen, strcat */ #include <stdarg.h> /* va_list, va_start, va_copy, va_arg, va_end */ /* print ints until a zero is found: */ void PrintInts (int first,...) { char * buffer; const char * format = "[%d] "; int count = 0; int val = first; va_list vl,vl_count; va_start(vl,first); /* count number of arguments: */ va_copy(vl_count,vl); while (val != 0) { val=va_arg(vl_count,int); ++count; } va_end(vl_count); /* allocate storage for format string: */ buffer = (char*) malloc (strlen(format)*count+1); buffer[0]='\0'; /* generate format string: */ for (;count>0;--count) { strcat (buffer,format); } /* print integers: */ printf (format,first); vprintf (buffer,vl); va_end(vl); } int main () { PrintInts (10,20,30,40,50,0); return 0; }
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