49 lines
1.0 KiB
C
49 lines
1.0 KiB
C
#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include "cmaybe.h"
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MAYBE_TYPE(intmax_t, intmax_t);
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MAYBE(intmax_t) average(intmax_t numbers[], size_t length) {
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ENABLE_RETURN(intmax_t);
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if (length == 0)
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RETURN_NOTHING();
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intmax_t sum = 0;
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for (size_t i = 0; i < length; i++) {
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intmax_t num = numbers[i];
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if (num > 0 && INTMAX_MAX - num < sum) {
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RETURN_NOTHING();
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} else if (num < 0 && INTMAX_MIN - num > sum) {
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RETURN_NOTHING();
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} else {
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sum += num;
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}
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}
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RETURN_VALUE(sum/length);
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}
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int main(void) {
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intmax_t numbers[] = {5, 7, 1, -8, INTMAX_MAX};
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MAYBE(intmax_t) results[6];
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results[0] = average(numbers, 0);
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results[1] = average(numbers, 1);
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results[2] = average(numbers, 2);
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results[3] = average(numbers, 3);
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results[4] = average(numbers, 4);
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results[5] = average(numbers, 5);
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for (size_t i = 0; i < sizeof(results) / sizeof(MAYBE(intmax_t)); i++) {
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IS_VALUE(results[i]) {
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printf("%zu: %jd\n", i, VALUE(results[i]));
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} else {
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printf("%zu: No value\n", i);
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}
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}
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return 0;
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}
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