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摘要： string substr (size_t pos = 0, size_t len = npos) const;// string::substr#include #include int main (){ std::string str="We think in generalities, bu... 阅读全文

摘要： int main(int argc, const char * argv[]) { // insert code here... string a = ""; cout<<a.size()<<endl; cout<<a.size()-1<<endl; cout<<a.... 阅读全文