include<stdio.h> intmain(){ include<stdio.h> intmain(){ intarr[]={1,2,3,4,5,6,7,8,9,10};//定义一个数组 intk=7;//为了算法的普遍性可以将代码改为intk=0;scanf("%d",&k); intsz=sizeof(arr)/sizeof(arr[0]);//数组元素个数 intleft=0;//左边的下标 intright=sz1;//右边的下标 while(left<=right){ intmid=(left+right)/2;//中间值 i...

include<stdio.h> include<string.h> intmain(){ chararr1[]="niupiwodebaobei"; chararr2[]=""; intleft=0; intright=strlen(arr1)1; while(left<=right){ arr2[left]=arr1[left]; arr2[right]=arr1[right]; printf("%s\n",arr2); left; right--; } return0; }

include<stdio.h> intmain(){ inti=0; charpassword[20]={0}; for(i=0;i<3;i){ printf("请输入密码："); scanf("%s",password); if(strcmp(password,"123456")0){//不能比较两个字符串的长度，应该用库函数strcmp printf("登陆成功\n"); break; }else{ printf("密码错误\na"); } } if(i3) printf("三次密码均错误，退出程序"); r...