输入一个大于3位的整数，编写一个程序，将它的十位数和百位数互换位置

#include "stdio.h"int main(void){ int m; while(printf("Input m(int 9999){ printf("%d --> %d\n",m,m/100%10*10+m/10%10*100+m%10+m/1000*1000); break; } printf("Error, enter again. ");