#include<stdio.h>
#include<string.h>
#include<stdlib.h>
int sortstring(const void* elem1, const void* elem2) {
return strcmp((char *) elem1,(char *)elem2);
}
int main() {
char s[25] = {0};//代表输入的是单个字符,而不是字符串
scanf("%s",&s);
int len = strlen(s);
qsort(s,l...