摘要：void test(int & val); void test2(const int & val); void test3(int val); struct Person{ string name; int age; int weight; }; int main() { int rats = 10; int & rodents = rats; ... 阅读全文

摘要：char *p; // 不以空字符结尾的只能是字符数组 char str[] = {'a', 'b', 'c', 'd', 'e'}; char str1[] = {'a', 'b', 'c', 'd', 'e', '\0'}; cout << str1 << endl; char str2[] = "sdfsdfsdfwerwetrwerfsd";... 阅读全文

摘要：int *p = new int; cout <<"p` address :" << p << endl; *p = 123; delete p; // int *p2 = 123; int *p1 = {1, 2, 3, 4, 6}; //以上形式是错误的，计算机只会分配指针占用的内存，但是不会初始化 右边数据的内存 //... 阅读全文

摘要：string str = "sdfsdfsd1234fsdf"; cout << str.size() << endl; cout << str.insert(str.size(), "123") << endl; cout << str.find("123") << endl; cout << str.substr(0, 4) << endl; cou... 阅读全文

摘要：char str[] = "123"; // strlen 只计算可见字符, sizeof 则包含'\0' 在内 cout << "strlen : " << strlen(str) << endl; cout << "sizeof :" << sizeof(str) << endl; char name[10]; char name1[10]; ... 阅读全文