61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
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#include <stdio.h>
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#include <math.h>
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#include <stdbool.h>
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#define def_func(name, op) \
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bool name(double left, double right) { \
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return left op right; \
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}
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def_func(eq, ==)
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def_func(ne, !=)
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def_func(lt, <)
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def_func(le, <=)
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def_func(gt, >)
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def_func(ge, >=)
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struct {
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const char *name;
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bool (*func)(double left, double right);
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} functions[] = {
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{ "==", eq },
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{ "!=", ne },
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{ "< ", lt },
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{ "<=", le },
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{ "> ", gt },
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{ ">=", ge },
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{ 0, 0 }
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};
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int main()
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{
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double values[] = {
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-sqrt(-1), // nan
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sqrt(-1), // -nan
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-log(0.0), // inf
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log(0.0) // -inf
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};
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double compare[] = { 2.0,
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-sqrt(-1), // nan
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sqrt(-1), // -nan
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-log(0.0), // inf
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log(0.0) // -inf
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};
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int i, j, k;
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for (i = 0; i < 4; i++) {
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for (j = 0; j < 5; j++) {
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for (k = 0; functions[k].name != NULL; k++) {
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printf("%g %s %g -> %s\n", values[i],
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functions[k].name,
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compare[j],
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functions[k].func(values[i], compare[j]) ? "True" : "False");
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}
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printf("\n");
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}
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}
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return 0;
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}
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