文章目录

  • 一、前言
  • 二、如何制定目标
    • 1、目标蓝图
    • 2、技术栈
    • 3、反向激励
  • 三、C++ 入门
    • 1、C++ 是世界上最好的语言
    • 2、编码能力
    • 3、算法
    • 4、小试牛刀
      • 1）标准输入输出
      • 2）ASCII 基础知识
      • 3）STL 排序函数 sort 的 应用
      • 4）简单字符串处理
      • 5）简单进制转换
      • 6）利用字符绘图
  • 四、结尾彩蛋
    • 1、巧用位运算
    • 2、结语

一、前言

  • 我们那个年代上大学的时候有个网站叫 校内网，相信那个年代的人都知道，期末复习功课的时候总是要刷一下，就像现在的抖音一样，有毒！最近我再去看的时候，发现密码已经完全忘记了，怎么试都试不出来。后来（BGM：我总算学会了，如何去爱！可惜你，早已远去，消失在人海），我终于意识到，我失去的又岂止是一个密码，更重要的，是我逝去的青春！
  • 我们总是在想，当初的我们如果能够这样那样就好了，但是，你有没有想一下，如果现在不动起来，到了未来，你同样还是会后悔！所以：

与其后悔当初，不如把握当下

  • 给自己树立一个目标是非常重要的，有目标才会有方向，有目标才会有动力，有目标才会有人生的意义；
  • 虽然我现在算得上衣食无忧，但是离财务自由还有很漫长的路要走，然而我不会放弃，因为这是我的最终目标，路漫漫其修远兮，吾将上下而穷索！

这里用到了一个穷字，乃 ‘穷其一生去求索’ 的意思，当然，也代表了我的真实写照：穷！

  • 接下来我就给大家分享一下，我在朝着这个目标努力的路上是如何前行的。
  • 当然，我不需要太多人点赞，你自己偷偷收藏就好，因为我不想太多人知道！毕竟有个词叫 ‘闷声发大财’ ！

二、如何制定目标

1、目标蓝图

  • 既然已经很明确了，目标是财务自由，那么我们就来把这个蓝图规划一下：
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贫穷的我
...
财务自由
  • 为了让这个事情看起来更加可行，我们需要把一些事情量化，比如赚多少钱以后才能称得上财务自由，估计算10亿吧，10个亿离财务自由应该也只剩临门一脚了，至少我是这么认为的，我一直认同一句话：

你永远赚不到超出你认知范围外的钱，就算赚到了，也往往会凭实力亏掉；
你所赚的每一分钱，都是你对这个世界认知的变现；

10亿人民币暂时已经超出了我的认知，再往上我无法想象，所以我们可以把蓝图更加细化一点，如下：

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贫穷的我
...
拥有10亿人民币
财务自由
  • 当然，我们还可以有其它途径，比如拥有 2000 套房，每套500万，其实也算10亿资产了，而且余生基本就靠收租就行了，还得雇人帮你收，当然理想是美好的，现实是残酷的。啊呸！怎么能说泄气的话，蓝图加上！
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贫穷的我
...
拥有10亿人民币
拥有1000套房
财务自由
  • 但是看起来还是那么的不靠谱，因为 这两个目标对于 ‘贫穷的我’ 来说，并不是那么容易达到的，我们还需要再理出一些中间环节。
  • 所以在大目标面前，我们需要制定一些小目标，比如 1个亿，1000万，100块 等等；
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贫穷的我
拥有10万人民币
拥有100万人民币
拥有1000万人民币
拥有1亿人民币
拥有10亿人民币
拥有1000套房
财务自由
  • 这里有个问题，我们只订立了要赚多少钱，然而这是一个虚无缥缈的目标，所以我们需要把它具象化。
  • 因为知识就是金钱，所以我们首先要扩充我们的知识体系，毕竟是 程序员的财务自由之路，技术栈才是我们最应该关心的；
  • 于是，我们找到了我们的另一条支线，然后你会发现，随着你的技术栈的提升，财务自由是水到渠成的事情；
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贫穷的我
拥有10万人民币
成为初级程序员
拥有100万人民币
成为中级程序员
拥有1000万人民币
成为高级程序员
拥有1亿人民币
成为资深程序员
拥有10亿人民币
成为架构师
拥有1000套房
成为首席架构师
财务自由

2、技术栈

栈是计算机中的一种数据结构，线性表的一种，特点是先进后出；常用在函数传参的实现中；

  • 举个例子，你在学习乘法之前，如果没有学习过加法，是不是不好理解，但是如果有了加法的基础，是不是会好理解很多；如图所示，
  • 就是一个乘法转换为加法的例子；
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依赖于
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  • 同样道理，在我们学习某一个知识的时候，一定会有一些知识盲区，这个时候就需要你去互联网上找各种资料了，对于程序员来说，通过各种经验和实践解决问题的能力才是你的 核心竞争力 。有了核心竞争力，我们画的蓝图才能得以实现！
  • 但是我们的知识体系并不是简单的线性结构，它是一个交错复杂的具有强依赖关系的图结构；所以，与其说是技术栈，不如说是技术图；
  • 如图所示，当你接触到一个新的概念，叫三角函数 y=sin(x)y = sin(x)y=sin(x) 的时候，你可能需要以下备用知识作铺垫，都是一些成年人一看就懂的概念，但是设想一下，如果你刚进入一个新的领域（比如 程序领域），扑面而来的技术面前可能你只是一个小婴儿，这个时候就像婴儿学习一样，必须从最基础的加法开始；
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三角函数
函数
等式
交换律
结合律
乘法
除法
减法
加法
未知数
三角形
边
长度
单位
点

3、反向激励

  • 时刻激励自己，如果没有动力，那么尝试来看看下面这段话；
  • 如果你不去奋斗，你的代价是什么？
  • 有人会说，那就穷一点呗，但是我过得舒服啊，我穷我快乐；

的确如此

  • 如果你认为教育的成本太高，那你就看看无知的代价；

  • 如果你不去努力奋斗，那你就尝试看看你为贫穷付出的代价，别人能用钱去解决的问题，你将不得不用时间、健康、尊严、甚至生命去解决；

  • 当我们的父母逐渐老去，我们还没有出人头地的时候，你才会发现什么叫无助！大多数人憧憬希望，但是不会为了希望去努力；大多数人讨厌拼命，但是会为了攥在手里的东西去拼命；

  • 所以，为了目标奋斗吧，少年！

三、C++ 入门

1、C++ 是世界上最好的语言

  • 前面说了这么多，接下来才是我要说的正题；
  • C++ 是世界上最好的语言！所以我想要把它推荐给刚步入大学的少年，甚至是想转行学程序的中年朋友们，我想说的是学好C++走遍天下都不怕，那么如何才能让你快速入门 C++ 呢？

答案只有一个，就是 天道酬勤

  • 任何事情都是熟能生巧的，需要不断地练习，反复的尝试；

2、编码能力

  • 我们是程序员，程序员是有另一种物种，我们超出三界之外，不在五行之中，能够实现各种各样千奇百怪的功能，只要你能想到，我就能给你实现出来；
  • 那么如何锻炼我们的编码能力成为了重中之重，推荐一个 HDU Online Judge（杭电在线评测系统），你可以去上面刷水题，上面的水题，如滔滔江水，连绵不绝，又如黄河泛滥，一发不可收拾！至少我当年刷题的时候，进入了一种境界：

水能三日不饮，饭可七日不食，然题不可一日不刷

  • 因为那时候上大学，目的很纯粹，它有个排名系统，每天就盼着排名一点一点往前走，所谓有竞争才有进步；
  • 有时候真的很怀念大学的日子，逃课去机房敲代码刷题，那是我逝去的青春！
  • 做任何事情都要有仪式感，让自己产生激情，才能继续往下走；

3、算法

程序=数据结构+算法程序 = 数据结构 + 算法程序=数据结构+算法

  • 很多人觉得算法是一个遥不可及的东西，其实并没有，只要按照好的习惯，遇到不懂就搞懂，逐渐强化自身的知识体系，总有一天算法会像你学习 1 + 1 时那么简单；

杠精：我小时候学 1 + 1 的时候花了一年；
作者：吃我一拳！杠精！

  • 学到的要教人，赚到的要给人，帮助别人成长的同时，自己也在成长，多回复别人提出的提问，那些问题可能是你未知的领域，这时候才是你学习的最佳时机；这就是强者愈强的道理；有使自己变强的法则在，谁都无法超越，相信自己！
  • 所以，如果有新手程序员遇到什么解决不了的问题，可以给这篇文章底下留言，在下必定竭尽所能，倾我所有，知无不言，言无不尽！

4、小试牛刀

1）标准输入输出

HDU 2003 求绝对值

  • 浮点数求绝对值函数 fabs 的应用
#include <iostream>
#include <cmath>
using namespace std;
double R;
int main() {while (scanf("%lf", &R) != EOF) {printf("%.2lf\n", fabs(R));}return 0;
}

2）ASCII 基础知识

HDU 2026 首字母变大写

  • ASCII 码的基础应用，大小写字母转换
#include <iostream>
using namespace std;
char str[200];
bool isspace(char c) {return c == ' ' || c == '\t';
}
int main() {int i;while (gets(str)) {bool space = true;for (i = 0; str[i]; ++i) {if (!isspace(str[i])) {if (space) {space = false;if (str[i] >= 'a' && str[i] <= 'z') {str[i] = str[i] - 'a' + 'A';}}}else {space = true;}}puts(str);}
}

3）STL 排序函数 sort 的 应用

HDU 2000 ASCII码排序

  • STL sort 排序接口的简单应用；
#include <iostream>
#include <algorithm>
using namespace std;
char ch[10];
int main() {while (scanf("%s", ch) != EOF) {sort(ch, ch + 3);printf("%c %c %c\n", ch[0], ch[1], ch[2]);}return 0;
}

4）简单字符串处理

HDU 2081 手机短号

  • 遍历一个字符串的字符并进行输出
#include <iostream>
using namespace std;
char str[10000];
int main() {int t, i;scanf("%d", &t);while (t--) {scanf("%s", str);printf("6");for (i = 6; i < 11; ++i) {printf("%c", str[i]);}puts("");}return 0;
}

5）简单进制转换

HDU 2031 进制转换

  • 计算机数字进制转换的应用；取模，迭代除进制，逆序输出，注意考虑 负数、0 的情况；
#include <iostream>
#include <cstring>
using namespace std;
int val, R;
int sta[100];
void Print(int v) {if (v >= 10 && v <= 16) {printf("%c", v - 10 + 'A');}else {printf("%d", v);}
}
int main() {int i;while (scanf("%d %d", &val, &R) != EOF) {if (val == 0) {puts("0");continue;}else if (val < 0) {val = -val;printf("-");}sta[0] = 0;while (val) {sta[++sta[0]] = val % R;val /= R;}for (i = sta[0]; i > 0; --i) {Print(sta[i]);}puts("");}return 0;
}

6）利用字符绘图

HDU 2052 Picture

  • 简单的利用字符进行控制台输出；
#include <iostream>
using namespace std;
int main() {int n, m;int i, j;while (scanf("%d %d", &n, &m) != EOF) {printf("+");for (i = 0; i < n; ++i) printf("-");printf("+\n");for (i = 0; i < m; ++i) {printf("|");for (j = 0; j < n; ++j) printf(" ");printf("|\n");}printf("+");for (i = 0; i < n; ++i) printf("-");printf("+\n");puts("");}return 0;
}
  • 有需要练习的可以去 git hub 上看源码 ：
  • 各类水题集锦（HDU2000 ~ HDU2099）
  • 各类算法模板

四、结尾彩蛋

1、巧用位运算

如何用一句话判断这个数是不是2的幂？

 x & (x - 1);

2、结语

  • 没什么好说的 ~

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