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C++
教程
參考
文章
論壇
參考
C 庫
<cassert> (assert.h)
<cctype> (ctype.h)
<cerrno> (errno.h)
C++11
<cfenv> (fenv.h)
<cfloat> (float.h)
C++11
<cinttypes> (inttypes.h)
<ciso646> (iso646.h)
<climits> (limits.h)
<clocale> (locale.h)
<cmath> (math.h)
<csetjmp> (setjmp.h)
<csignal> (signal.h)
<cstdarg> (stdarg.h)
C++11
<cstdbool> (stdbool.h)
<cstddef> (stddef.h)
C++11
<cstdint> (stdint.h)
<cstdio> (stdio.h)
<cstdlib> (stdlib.h)
<cstring> (string.h)
C++11
<ctgmath> (tgmath.h)
<ctime> (time.h)
C++11
<cuchar> (uchar.h)
<cwchar> (wchar.h)
<cwctype> (wctype.h)
容器
C++11
<array>
<deque>
C++11
<forward_list>
<list>
<map>
<queue>
<set>
<stack>
C++11
<unordered_map>
C++11
<unordered_set>
<vector>
輸入/輸出
<fstream>
<iomanip>
<ios>
<iosfwd>
<iostream>
<istream>
<ostream>
<sstream>
<streambuf>
多執行緒
C++11
<atomic>
C++11
<condition_variable>
C++11
<future>
C++11
<mutex>
C++11
<thread>
其他
<algorithm>
<bitset>
C++11
<chrono>
C++11
<codecvt>
<complex>
<exception>
<functional>
C++11
<initializer_list>
<iterator>
<limits>
<locale>
<memory>
<new>
<numeric>
C++11
<random>
C++11
<ratio>
C++11
<regex>
<stdexcept>
<string>
C++11
<system_error>
C++11
<tuple>
C++11
<type_traits>
C++11
<typeindex>
<typeinfo>
<utility>
<valarray>
<random>
分佈
C++11
bernoulli_distribution
C++11
binomial_distribution
C++11
cauchy_distribution
C++11
chi_squared_distribution
C++11
discrete_distribution
C++11
exponential_distribution
C++11
extreme_value_distribution
C++11
fisher_f_distribution
C++11
gamma_distribution
C++11
geometric_distribution
C++11
lognormal_distribution
C++11
negative_binomial_distribution
C++11
normal_distribution
C++11
piecewise_constant_distribution
C++11
piecewise_linear_distribution
C++11
poisson_distribution
C++11
student_t_distribution
C++11
uniform_int_distribution
C++11
uniform_real_distribution
C++11
weibull_distribution
生成器
C++11
default_random_engine
C++11
discard_block_engine
C++11
independent_bits_engine
C++11
knuth_b
C++11
linear_congruential_engine
C++11
mersenne_twister_engine
C++11
minstd_rand
C++11
minstd_rand0
C++11
mt19937
C++11
mt19937_64
C++11
random_device
C++11
ranlux24
C++11
ranlux24_base
C++11
ranlux48
C++11
ranlux48_base
C++11
shuffle_order_engine
C++11
subtract_with_carry_engine
其他
C++11
generate_canonical
C++11
seed_seq
poisson_distribution
C++11
泊松分佈::(建構函式) (poisson_distribution::(constructor))
成員函式
C++11
泊松分佈::max (poisson_distribution::max)
C++11
泊松分佈::mean (poisson_distribution::mean)
C++11
泊松分佈::min (poisson_distribution::min)
C++11
泊松分佈::operator() (poisson_distribution::operator())
C++11
泊松分佈::param (poisson_distribution::param)
C++11
泊松分佈::reset (poisson_distribution::reset)
非成員函式
C++11
operator<<
C++11
operator>>
C++11
關係運算符
參考
<random>
poisson_distribution
mean
公有成員函式
<random>
std::
poisson_distribution
::mean
double mean() const;
均值
返回與
poisson_distribution
關聯的
均值
引數。
此引數表示區間內觀察到的事件的平均數量。
此引數在
構造時
設定。
引數
無
返回值
與分佈物件關聯的
均值
引數。
複雜度
常量。
另見
泊松分佈::(建構函式) (poisson_distribution::(constructor))
構造泊松分佈
(公有成員函式)
泊松分佈::param (poisson_distribution::param)
分佈引數
(公共成員函式)