Implement MY_STRCHR () and MY_STRRCHR () in C language

The MY_STRCHR () function finds the position of the first occurrence of the character ch in the string str, and the prototype is as follows

Char *strchr (char const *str,int CH);

The MY_STRRCHR () function finds the last occurrence of a character in the string str, the prototype is as follows

Char *strrchr (char const *str,int CH);

#include <stdio.h>int main () {Char const * MY_STRCHR (char  const *STR, char ch);    Char Const * MY_STRRCHR (char  const *STR, char ch), char str[]= "ASFDGDHJJK", Char ch= ' d ';p rintf ("%s\n", MY_STRCHR (str, CH));p rintf ("%s\n", MY_STRRCHR (Str,ch)); return 0;} Char Const * MY_STRCHR (char  const *STR, char ch) {while (*str! = ') '//Determine if STR has found the last character {if (ch = = *str)// When you first find ch in str, return to Ch{return str;} str++;} Return null;//returns Null}char const * MY_STRRCHR (char  const *STR, char ch) {Char const*last = Null;char const*p when no ch is in Str Art = MY_STRCHR (str,ch);//Find where CH first appears in STR while (part! = NULL) {last = part;//assigns the position of ch to Lastpart = MY_STRCHR (part+1,ch) ;//Continue to determine whether there are ch}return last;//in STR and finally return to the last position of CH}

Implement MY_STRCHR () and MY_STRRCHR () in C language