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摘要： c++primer 页数：376-379 备份， 很有嚼头#include #include #include using namespace std;class Screen{ public: typedef string::size_type index; Screen(index r, index c) : row(r), col(c), contents(r * c, 0) {}; Screen& set(index r, index c, char val); Screen& set(char val); S... 阅读全文