关于网络制式（例如：TD-SCDMA /GSM）

#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include <string.h>
void reserve(char *left,char*right)
{
while (left < right)
{
char tmp = *left;
*left = *right;
*right = tmp;
left++;
right--;
}
}
int main()
{
char arr[10] = "AABCD";
int len = strlen(arr)-1;
int k = 0;
char *pstart = &arr[0];
char *pend = arr+len;
scanf("%d", &k);
reserve(pstart, pstart + k -1);
reserve(pstart + k, pend);
reserve(pstart, pend);
printf("%s\n", arr);
system("pause");
return 0;
}