21 lines
418 B
C
21 lines
418 B
C
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#include <stdarg.h>
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/* Sums variadic long args until sentinel -1 is seen. */
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long va_sum_sentinel(long first, ...) {
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va_list ap;
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va_start(ap, first);
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long total = first;
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while (1) {
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long v = va_arg(ap, long);
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if (v == -1) break;
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total += v;
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}
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va_end(ap);
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return total;
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}
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/* Non-variadic helper for comparison. */
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long add_two(long a, long b) {
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return a + b;
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}
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