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一个完全入门初学者如何学代码,读代码和写代码,,我想学代码不知道方向谁能给我指明一个方向?
1、学代码:前提是你的复有一个比较系统的学习.认真完成每一个课程中的案例.
2、读代码:分制两步走:前期能读懂自己写的代码.2113
后期能读懂他人写的代码和大致的知道底层的某些源码的含义.多去5261看开发文档(开发文档建议使用官方提供的4102英文版、不要使用中文自己害自己)
3、写代
码1653:前提是你要有基础.
我是一名初学者,程序简单一点
c语言
#include"stdio.h"
void Calculate(){
float a=0;
float b=0;
printf("Input first number");
scanf("%f",&a);
printf("Input second number");
scanf("%f",&b);
printf("a+b=%f",a+b);
printf("a-b=%f",a-b);
printf("a*b=%f",a*b);
if(b!=0){
printf("a/b=%f",a/b);
}
else{
printf("The divisor can not be zero");
}
}
求一些供C语言初学者看的源代码
输入十个数,求出最大数.
#include
double max_number(double x[])
{
double max=x[0];
int i;
for(i=1;i<=9;i++)
{
if(max{
max=x[i];
}
}
return max;
}
void main()
{
double a[10];
int i;
printf("请输入十个数:\n");
for(i=0;i<=9;i++)
{
scanf("%lf,",&a[i]);
}
printf("最大数为:%.4f\
n",max_number(a));
}
看代码的时候要学习一个代码的什么?
对于一个初学者来讲,那就是程序最初的含义:算法加数据结构.这两样就是我们最主要学的.
而对于一个相对成熟的程序员来讲,要看代码的可读性,可维护性,可持续性.
可读性:即编程规范.
1)注释:
> 注释没有根据代码变化进行同步更新
> 注释有误,常见代码注释copy后,没有修改注释÷
> 文件头、函数注释不完整
2)易看
> 避免使用复杂的表达式,注意运算符优先级
3)排版
4)魔鬼数字
> 有逻辑或业务含义的数字都应定一宏或使用常量字符串代替
5)命名规则
> 符合命名规则,且变量名整体风格要一致
等等.
可维护性:其中之一就包含了可读性,可读性强的代码自然遇到问题容易找.再者看代码的模块独立性是否强,修改其中一块代码是否会影响其他代码.或者修改一个问题,是否需要到处修改.
可持续性:这个主要看设计的人是否想到以后有扩展的可能性,接口和数据结构扩展性是否灵活.
如果是一个高手:看程序是否有更好的方法可以去实现.一般会从性能上去考虑.
