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#include <stdarg.h> double f (float f1, float f2, float f3, float f4, float f5, float f6, ...) { va_list ap; double d; va_start (ap, f6); d = va_arg (ap, double); va_end (ap); return d; } int main () { if (f (1, 2, 3, 4, 5, 6, 7.0) != 7.0) abort (); exit (0); }