/這裡是string的使用方式
string one("lotty winner");
cout << one << endl;
string tow(20, '$');
cout << tow << endl;
string three(one);
cout << three << endl;
one += "hellow one";
cout << one << endl;
three[0] = 'p';
cout << three << endl;
string four;
four = one + tow;
cout << four << endl;
char alll = "all s well that ends well";
cout << alll << endl;
string five(alll, 10);
cout << five << endl;
string six(alll + 2, alll + 10);
cout << six << endl;
string seven(&five[6], &five[8]);
cout <<"seven: "<< seven << endl;
string eight(four, 7, 2);
cout << eight << endl;
///使用初始化列表的方式
initializer_listpontchar = ;
string charstr(pontchar);
cout << charstr << endl;
for (auto itm : charstr)
//這裡看乙個使用初始化列表的類.
class autoptr
void showdata()
cout << endl;
}private:
int number;
char* strname;
std::initializer_listlistp;
};//使用方式.
autoptr tmep;
tmep.showdata();
char te1 = 0;
decltype(te1) te2 =12 ;
cout << te2 << endl;
//測試一下引用.
const int k = 11;
decltype(k*2) k2 = k;
cout <<"k+1: "<< k2 << endl;
//測試一下指標.
const int* ptrk = &k;
decltype(ptrk) ptrk2 = ptrk;
cout << *ptrk2 << endl;
//常量指標和指標常量.
int a = 10;
int b = 12;
constmethod(&a,&b);
cout << "a: " << a << " b: " << b << endl;
//又回到了原始的總結，要想在某乙個函式裡面，達到修改數值的目的，必須要做到
//存在差級.....
int* k222 = &a;
constmethod2(&k222, &b);
cout << "a: " << a << " b: " << b << endl;
#pragma endregion
#pragma region 函式模板的問題.
auto tt =eff(10, 20);
cout << "型別.tt: " << tt << endl;
#pragma endregion
initializer_listlistsi;
for (auto & tek : listsi)
cout << endl;
vectorvecint = ;
for (auto &veck : vecint)
cout << endl;
arrayartemp = ;
for (auto art : artemp)
cout << endl;
cout << "first element: " << get<0>(artemp) << endl;
for (int i = 0; i < artemp.max_size(); i++)
cout << endl;
std::arraymyarray = ;
std::tuplemytuple(10, 20, 30);
std::tuple_element<0, decltype(myarray)>::type myelement; // int myelement
myelement = std::get<2>(myarray);
std::get<2>(myarray) = std::get<0>(myarray);
std::get<0>(myarray) = myelement;
std::cout << "first element in myarray: " << std::get<0>(myarray) << "\n";
std::cout << "first element in mytuple: " << std::get<0>(mytuple) << "\n";
cout << endl;
#pragma region 元組
auto tup1 = std::make_tuple("first", "second", 23, 't', 355);
for (int ik =0;ik< tuple_size::value;ik++)
cout << endl;
auto tup2 = std::forward_as_tuple(1, "3344");
cout << get<1>(tup2) << endl;
#pragma endregion
選了這裡記錄一些碎片
雖然沒發過聲。但接觸這個 倒是很久了。抄作業查答案。牆裡來的姑娘它讀不懂英文呀。簡單說兩句就算開篇了。我是乙個正在掉頭髮的程式設計師。接觸這行，要從小學不會扔火球的馬里奧說起。那個是乙個夏天，好了下一段。吃這碗飯10年左右了。感謝兄弟姐妹的幫襯，混的比較慘。主營那個被吹了一萬年的c 還是嵌入式的。有...
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