c++

#include #include using namespace std; int main() { string alpa = "abcdefghijklmnopqrst"; int rtn = alpa.find("jk"); if (rtn > 0) cout

#include #include using namespace std; class Something { public: int m_value = 0; Something(const Something& st_in) { m_value = st_in.m_value; cout

#include #include using namespace std; class Calc { private: int m_value; public: Calc(int init_value) :m_value(init_value) {} Calc& add(int value) { m_value += value; return *this; } Calc& sub(int value) { m_value -= value; return *this; } Calc& mult(int value) { m_value *= value; return *this; } void print() { cout