lala-la

摘要： include include include using namespace std; int main() { string str = "Hello, c++"; //使用push_back()在字符串末尾添加字符 str.push_back('!'); cout << "string:" < 阅读全文

摘要： include include include using namespace std; int main() { vector numbers;//创建vector并且为它赋值10 20 30 40 numbers.push_back(10); numbers.push_back(20); num 阅读全文