strlen函数

#include<stdio.h>int my_strlen1(char *q)//计数器思想求字符串长度{   int count=0;   while(*q!='\0')       {   count++;   }   return count;}int my_strlen2(char *str)//指针思想求字符串长度{char *l;l=str;while(*l!='\0'){l++;}return (l-str);}int my_strlen3(char *p)//用递归函数求字符串长度{if(*p=='\0')return 0;elsereturn 1+my_strlen3(p+1);}int main(){char b[10]="asdyufe";int q=my_strlen3(b);printf("%d\n",q);return 0;}