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C++
- void exit(int status); // in <cstdlib>
- enum Enum_Type { a, b, c };
- this->a = a;
- std::ostream& operator<<(std::ostream& os, const T& obj)
- EXIT_FAILURE // <cstdlib>
- switch (e) { case c1: [case c1':] s; break; ... default: d; }
- gettimeofday(tv, NULL)
- NULL macro in <cstdlib>
- `this' is of type `[const] Class_Name *'
- enum class Color { RED, ..., BLUE }; // then Color::RED
- friend std::ostream& operator<<(std::ostream& os, T& t);
- NULL defined in <cstddef>
- ofstream f; f << "Hello file!\n"; f.close();
- std::string in <string>
- std::string s = std::to_string(number);
- strcmp // #include <cstring>
- do { // something } while (!condition); // do until
- f.open(path, std::ios_base::in);
- "static ..." in class, then "const type Class::name = data;"
- int char = getchar(); // getchar in <cstdio>
- in definition of static method, don't use "static"
- std::hex // and more
- typedef unsigned int uint;
- srand(time(NULL)); int i = rand() % 10 + 1;
- f.seekg(pos);
- std::getline(f, arg, ',');
- time_t now = time(NULL); // in <ctime>
- int num_of_elements = sizeof(str)/sizeof(str[0]);
- how to sleep for milliseconds
- static function visible to functions in the same file
- signal.h
- extern int global_int; // in header, then include and assign
- 'extern' in .hh: global var, defined in *one* .cc/.cpp file
- printf("Value: %llu\n", x);
- std::this_thread::sleep_until
- std::this_thread::sleep_for(std::chrono::nanoseconds(1));
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