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This article introduces the relevant knowledge of "what are the methods of string copy function". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Strcpy, which stands for string copy (string copy).

Is a function that implements string copying in the C language standard library.

One of the favorite written test questions of major companies, come and have a look, how many methods do you know?

Q: how would you implement this function?

1.

Void strcpy (char * strDest, char * strSrc) {while ((* strDest++ = * strSrc++)! ='\ 0');}

two。

/ / add the source string strSrrc to const, indicating that it is a constant input parameter void strcpy (char * strDest, const char * strSrc) {while ((* strDest++ = * strSrc++)! ='\ 0');}

three

Void strcpy (char * strDest, const char * strSrc) {/ / for source address strSrc and destination address strDest plus non-NULL (0) assert assert ((strDest! = NULL) & & (strSrc! = NULL)); while ((* strDest++ = * strSrc++)! ='\ 0');}

four

/ / to implement chained operation, return the destination address to char* strcpy (char* strDest, const char* strSrc) {assert ((strDest! = NULL) & & (strSrc! = NULL)); char* address = strDest; while ((* strDest++ = * strSrc++)! ='\ 0'); return address;}

five

.text mystrcopy: LDRB R2, [R1], # 1 STRB R2, [R0], # 1 CMP R2, # 0 BNE mystrcopy MOV pc, lr "what are the methods of string copy function"? thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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