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56 lines
1.0 KiB
56 lines
1.0 KiB
#include <stdio.h>
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#include <math.h>
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int main(void)
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{
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double x, result, answer;
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char str[80];
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int i;
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int k = 0;
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#if 0
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x = 0.0;
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answer = 1.0;
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result = log(x);
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if (result != answer) {
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printf("log(%g) = %g, should be %g\n", x, result, answer);
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}
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#endif
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x = -1.0;
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result = log(x);
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sprintf(str, "%g", result);
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if (strcmp(str, "1.#INF")) {
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printf("log(%g) = %g, should be %s\n", x, result, "1.#INF");
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}
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#if 0
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x = -1.1e300;
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result = log(x);
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sprintf(str, "%le", result);
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if (strcmp(str, "-1.#INF00e+000")) {
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printf("log(%g) = %g, should be %s\n", x, result, "-1.#INF00e+000");
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}
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for (i = 1, x = 0.0; i < 1000; i++) {
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answer = 1.0;
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result = log(x);
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/*
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if (result != answer) {
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printf("log(%g) = %g, should be %g\n", x, result, answer);
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}
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*/
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}
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#endif
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if (k) {
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printf("\n\tFailed %d tests...\n", k);
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} else {
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printf("\n\tPassed all tests...\n", k);
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}
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}
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