昨天寫了一個代碼，使用C語言畫三角形，既然寫了那個，那就繼續畫一條直線，這個也很有意思。

C語言不調用庫函數畫一個三角形

直線的方程是

如下圖所示

— — 斜率的范圍

(-∞,+∞)

既然知道公式了，我們就直接上代碼吧，之前有人評論說 putchar函數可以修改下，這次我們就修改下。

還有，我這次就不用浮點型了，直接用int來做計算。

#include?"stdio.h"typedef?struct?{int?x,y; }?Vec; /*y=kx+b*/ int?judge(Vec?p,int?k,int?b){int?tmp?=?p.y?-?k*p.x?-b;if(tmp?==?0)return?1;return?0; }int?main(){Vec?p;int?k?=?1;int?b?=?16;for(p.y?=?50;p.y>=?-50;p.y?-=2,putchar('\n'))for(p.x?=?-50;p.x?<=?50;p.x++)putchar(judge(p,k,b)?'@':'.'); }

用圖片來更直觀的來感受下輸出

如果坐標系更大，就會更細膩

—— 程序輸出

weiqifa@bsp-ubuntu1804:~/c$?gcc?elsfk.c?&&?./a.out ....................................................................................@................ ..................................................................................@.................. ................................................................................@.................... ..............................................................................@...................... ............................................................................@........................ ..........................................................................@.......................... ........................................................................@............................ ......................................................................@.............................. ....................................................................@................................ ..................................................................@.................................. ................................................................@.................................... ..............................................................@...................................... ............................................................@........................................ ..........................................................@.......................................... ........................................................@............................................ ......................................................@.............................................. ....................................................@................................................ ..................................................@.................................................. ................................................@.................................................... ..............................................@...................................................... ............................................@........................................................ ..........................................@.......................................................... ........................................@............................................................ ......................................@.............................................................. ....................................@................................................................ ..................................@.................................................................. ................................@.................................................................... ..............................@...................................................................... ............................@........................................................................ ..........................@.......................................................................... ........................@............................................................................ ......................@.............................................................................. ....................@................................................................................ ..................@.................................................................................. ................@.................................................................................... ..............@...................................................................................... ............@........................................................................................ ..........@.......................................................................................... ........@............................................................................................ ......@.............................................................................................. ....@................................................................................................ ..@.................................................................................................. @.................................................................................................... ..................................................................................................... ..................................................................................................... ..................................................................................................... ..................................................................................................... ..................................................................................................... ..................................................................................................... ..................................................................................................... .....................................................................................................

---

---

推薦閱讀：

專輯|Linux文章匯總

專輯|程序人生

專輯|C語言

我的知識小密圈

關注公眾號，后臺回復「1024」獲取學習資料網盤鏈接。

歡迎點贊，關注，轉發，在看，您的每一次鼓勵，我都將銘記于心~

嵌入式Linux

微信掃描二維碼，關注我的公眾號

總結

以上是生活随笔為你收集整理的C语言不调用库函数画直线的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。