33 lines
736 B
C++
33 lines
736 B
C++
#pragma once
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#include <time.h>
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#include <cmath>
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namespace RandT {
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template <typename T>
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T RandT(T _min, T _max) {
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T temp;
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if (_min > _max) {
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temp = _max;
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_max = _min;
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_min = temp;
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}
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return rand() / (double)RAND_MAX * (_max - _min) + _min;
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}
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double GuassRand(double mean = 0, double sigma = 0) {
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double U1 = rand() * 1.0f / RAND_MAX; // 0~1均匀分布
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double U2 = rand() * 1.0f / RAND_MAX; // 0~1均匀分布
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double Z =
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sqrt(-2 * log(U1)) * cos(2 * M_PI * U2); // 均值为0，方差为1的正态分布
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double Y;
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if (sigma >= 0) {
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Y = mean + sqrt(sigma) * Z;
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} else {
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Y = mean + Z;
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}
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return Y;
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}
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bool randomBool() { return 0 + (rand() % (1 - 0 + 1)) == 1; }
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} // namespace RandT
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