o.h>void main(){char c1;printf("请输入一个小写字母:\n");scanf("%c",c1);if(c1>=97c1<=122) // if(c1>='a'c1<='z')#define N 20void initial_string(char arr_str[M][N]); //初始化数组void sort_string(char arr_str[M][N]); //主元排序void out_stri...