写一个函数实现字符串逆序输出

#include
#include 
void Reversestring(char *a){
 char *start = a, *end = a+strlen(a)-1;
 while (start < end){
 char temp = *start;
  *start = *end;
  *end = temp;
  start++;
  end--;
 }
}
int main(){
 char arr[] = "ABCDEF";
 char *a = arr;
 printf("%s\n", arr);
 Reversestring(arr);
 printf("%s\n", arr);
 return 0;
}