Copy function optimization

Table of contents

Use strcpy in the library function

Make a copy function yourself 

optimize code 

Optimization 1.0

 Optimization 2.0

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Use strcpy in the library function

When using the strcpy function, remember to quote the header file #include <string.h>. strcpy is to copy the content of arr2 to arr1 

Make a copy function yourself 

We create a My_strcpy function by ourselves, which changes the address of the content in the array through pointers

optimize code 

Optimization 1.0

Simplifies the steps in the sub-function to make the code look more concise

 Optimization 2.0

This solves a small problem in 1.0, that is, when arr2 is a null pointer, the code cannot run. Here we use an assert function to deal with it. Remember to reference the header file here #include <assert.h>

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Here, if we want to be an excellent programmer, we must simplify the code as much as possible with a good code style.