Shulou(Shulou.com)06/02 Report--

This article mainly introduces how to use string processing functions in C language, which has a certain reference value. Interested friends can refer to it. I hope you will gain a lot after reading this article.

Strlen:1. Counter version: # include#include#includeint my_strlen (const char * str) {int count = 0; assert (stringed blocks null); while (* stringed boxes'\ 0') {count++; str++;} return count;} 2. Recursive version int my_strlen (const char * str) {assert (str! = NULL); if (* str = ='\ 0') return 0; return (my_strlen (+ + str) + 1);} 3. Pointer-pointer version int my_strlen (const char * str) {char * end = str; assert (stringing null); assert (endpoints null); while (* endpoints ='\ 0') {end++;} return end-str;} strcat:#include#include#includechar * my_strcat (char * dest,char * str) {char * ret=dest;// first address assert (dest&&str) While (* dest) {dest++;} while (* dest++=*str++); dest=ret; return dest;} strcmp:int my_strcmp (char * str1, char * str2) {assert (str1&&str2) While (* str1==*str2) {if (str1=='\ 0diagnostic str2 examples) return 0; str1++; str2++;} if (* str1 > * str2) return 1; return-1; / / or return str1-str2 } Thank you for reading this article carefully. I hope the article "how to use string processing functions in C language" shared by the editor will be helpful to everyone. At the same time, I also hope that you will support and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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