2024.5.22 閑話

有意義，但不太有意義

See You Again

It's been a long day without you my friend

And I'll tell you all about it when I see you again

We've come a long way from where we began

Oh I'll tell you all about it when I see you again

When I see you again

Wiz Khalifa：

D**n who knew

All the planes we flew

Good things we been through

That I'd be standing right here talking to you

'Bout another path

I know we loved to hit the road and laugh

But something told me that it wouldn't last

Had to switch up look at things different see the bigger picture

Those were the days hard work forever pays

Now I see you in a better place

See you in a better place

Uh

How could we not talk about family when family's all that we got

Everything I went through

You were standing there by my side

And now you gon' be with me for the last ride

Charlie Puth/Wiz Khalifa：

It's been a long day without you my friend

And I'll tell you all about it when I see you again

I'll see you again

We've come a long way

Yeah we came a long way

From where we began

You know we started

Oh

I'll tell you all about it when I see you again

I'll tell you

When I see you again

Charlie Puth：

Aah oh aah oh

Wooooh-oh-oh-oh-oh-oh

Yeah

Wiz Khalifa：

First you both go out your way and the vibe is feeling strong

And what's small turned to a friendship

A friendship turned to a bond

And that bond will never be broken

The love will never get lost

The love will never get lost

And when brotherhood come first

Then the line will never be crossed

Established it on our own when that line had to be drawn

And that line is what we reached so remember me when I'm gone

Remember me when I'm gone

Wiz Khalifa：

How could we not talk about family when family's all that we got

Everything I went through you were standing there by my side

And now you gon' be with me for the last ride

Charlie Puth：

So let the light guide your way yeah

Hold every memory as you go

And every road you take

Will always lead you home home

It's been a long day without you my friend

And I'll tell you all about it when I see you again

We've come a long way from where we began

Oh I'll tell you all about it when I see you again

When I see you again

Charlie Puth/Wiz Khalifa：

Aah oh aah oh

Uh

Yeah

Yeah

Wooooh-oh-oh-oh-oh-oh

Yo

When I see you again

Yo uh

See you again

Yo yo

Oh-oh

Uh-huh

Yup

When I see you again

第一篇閑話。

起因是調錯保留位數調了 1h-

~~然后寫這個寫了 2h+~~

~~其實主要是想吧目錄撐起來~~

括號里面是傳參。

有的有 std:: 前綴，是因為和變量名沖突會優先調用變量。

實在怕沖突可以都加上。

沒說的修改大概都永久有效，沒說 \(yes/no\) 的默認 no。

cin cout 語法唐氏：

cin：

無特殊說明用法都是 cin.xxx(xxx)。

setw(int) 用于分塊輸入和限制輸入長度（只設置下一個）。

用法 cin>>setw(int)>>xxx;
peek() 窺探下一個字符，但不讀入。
putback(char) 將 char 再放輸入緩存（可以再讀），很玄學，沒搞懂，兩次讀取之間只放一個字符比較穩，不然可能寄。
unget() 撤銷上一次字符的讀入，只撤銷一個字符，可多次使用（不要越界）。
gcount() 返回上次讀入字符數量，會被大多數修改（包括 unget() 等）改變或清空。
std::ws 清除所有前綴空白字符，一般用于 cin 后接 getline 時用 getline(cin>>std::ws,xxx) 避免讀入空白和回車。

用法 cin>>std::ws;
get() 讀入一個字符，早期沒有 char 時用于讀入 '7' 等。
get(char*,int) 和下面的 cin.getline 差不多，因為沒有越界檢查，建議用下面的。
getline(char*,int) 是 cin.getline 哦，用于讀入字符數組，int 是長度，和 getline 一樣不會忽略前綴空白字符。
read(char*,int) 一直讀入，直到讀了 int 個或到文件尾。
std::hex,std::dec,std::oct 分別當做 \(16,10,8\) 讀入整數，也可以直接用 setbase(int) ，int 為 \(16,10,8\) 否則無效，默認 dec。

用法 cin>>std::hex; cin>>setbase(16);
(no)skipws 是否跳過空白字符，默認 \(yes\)

用法 cin>>skipws;
quoted(string,char1,char2) 用于讀入帶分隔字符的字符串：

string 讀入串。

char 分隔符，默認 "。

char2 轉義符，默認 \。

用法 cin>>quoted(xxx,xxx,xxx)。
例子
```
#include <bits/stdc++.h>
using namespace std;

int main() {
	string a;
	cin >> quoted(a);
	cout << a;
}
```
\(input\):

"this is a string, we can \"read\" it.
and it can in many lines."

\(output\):

this is a string, we can "read" it
and it can in many lines.

cout：

無說明用法都是 cout<<xxx

std::hex,std::dec,std::oct,setbase(int) 同 cin。
(no)showbase 在輸出 \(16,8\) 進制時是否輸出 0x，0
(no)showpoint 設置是否輸出小數點后省略的末尾 \(0\)
(no)uppercase 輸出大（小）寫，指 0X2F5 （十六進制數）之類的
(no)unitbuf 設置是否自動 flush
setprecision(int) 設置浮點精度，具體以浮點數格式為準
fixed 設置浮點數格式為定點（會保留到小數點后 setprecision(int) 位，且不去末尾 \(0\)）
scientific 設置浮點數格式為科學計數法（轉為科學計數法后保留到小數點后 setprecision(int) 位，且不去末尾 \(0\)）
hexfloat 用 \(16\) 進制輸出浮點數（沒有 \(8\) 進制），會忽略其他對浮點數的指定，包括 setprecision(int)。
defaultfloat 浮點數格式返回默認值，總共保留 setprecision(int) 位有效數字（包括整數位），去除末尾 \(0\)。
setw 設置寬度（只設置下一個）。
setfill(char) 設置在寬度不滿時的填充字符。
std::left,std::right,std::internal 控制左，右，標號在左（如 0x）數字在右，默認 right。
resetiosflags 重置，參數可傳：
1. ios::basefield 重置整數進制。
2. ios::floatfield 重置浮點數格式。
3. ios::adjustfield 重置對齊。
get_money/put_money/get_time/put_time 解析、輸出貨幣、時間（不會用）。
quoted(string,char,char) 同 cin

~~求教教怎么放歌詞~~

posted @ 2024-05-22 15:17 xrlong 閱讀(83) 評論(4) 收藏舉報

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2024.5.22 閑話

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