c++隨機字符串生成

#include <iostream> #include <random> #include <ctime> #include <chrono> namespace ShellRandom { static std::uniform_int_distribution<int> diProbability_; static std::default_random_engine dre_; template<class T> T DiRandom(T minT, T maxT) ; template<> int DiRandom<int>(int minT, int maxT) ; void DiRandomSeed(std::default_random_engine::result_type seed) ; } std::uniform_int_distribution<int> diProbability_; std::default_random_engine dre_(std::default_random_engine::default_seed); namespace ShellRandom { template<class T> T DiRandom(T minT, T maxT) { std::uniform_int_distribution<T> di(minT, maxT); return di(dre_); } template<> int DiRandom<int>(int minT, int maxT) { diProbability_.param(std::uniform_int_distribution<int>::param_type(minT, maxT)); return diProbability_(dre_); } void DiRandomSeed(std::default_random_engine::result_type seed) { dre_.seed(seed); } } int main() { std::string str; str.reserve(256); // 可以用時間戳代替 ShellRandom::DiRandomSeed(1594285196729786); for (int i = 0; i < 256; ++i) { char r = ShellRandom::DiRandom<char>(33, 126); // 指定字符生成范圍 str.append( 1, r); } std::cout << str; return 0; }