c语言康复训练-1
//100以内取奇数
int main()
{
int i = 0;
while (i < 101)
{
if (i % 2 == 1)
{
printf("%d\n",i);
}
i++;
}
}
//n的阶乘练习
int main()
{
int a = 0;
int b = 1;
int i = 1;
printf("请输出阶乘数字\n");
scanf("%d", &a);
while (i <= a)
{
b = b*i;
i++;
}
printf("结果是%d", b);
return 0;
}
//1！+2！+…
int main()
{
int a = 0;
int b = 1;
int sum = 0;
int i = 0;
printf("请输入你想要输入的数据\n");
scanf("%d", &a); //接收输入的数值a
for (i = 1;i <= a;i++)
{
b = b * i;
sum = sum + b;
}
printf("您得到的最终结果是:%d\n", sum);
printf("您得到的结果是:%d\n", b);
return 0;
}
//二分法查找某数
#include<stdlib.h>
int main()
{
int arr[] = {
0,1,2,3,4,5,6,7,8,9,10 };
int a = 0;
int left = 0;
int i = 0;
printf("请输入你的数字：");
scanf("%d", &a);// 输入数字存进a
int b = sizeof(arr) / sizeof(arr[0]);
int right = b - 1;
while (left <= right)
{
int i = (right + left) / 2;
if (arr[i] > a)
{
right = i-1;
}
else
if (arr[i] < a)
{
left = i + 1;
}
else
{
printf("您所输入的数字是：%d", a);
break;
}
}
if (left > right)
{
printf("结果是没找到");
}
return 0;
}
//汇聚效果的welcome 设置
int main()
{
char arr1[] = "welcome to HF !!!";
char arr2[] = "*****************";
int left = 0;
int sz = sizeof(arr2) / sizeof(arr2[0]);
int right = sz-2;
while (left <= right)
{
arr2[left] = arr1[left];
arr2[right] = arr1[right];
left++;
right--;
printf("%s\n", arr2);
}
return 0;
}
/三次密码实验
int main()
{
int a = 0;
char arr[] = {
0 };
for (a = 0; a < 3; a++)
{
printf("输入密码:");
scanf("%s", arr);
if (strcmp(arr, "123456") == 0)//等号不能用来比较两个字符串一样，应该用库函数
//strcmp 函数
{
printf("恭喜你解锁成功");
break;
}
else
{
printf("恭喜你解锁失败");
}
}
if (a == 3)
{
printf("爆炸\n");
}
return 0;
}
//辗转相除法求最大公约数
#include<stdlib.h>
#include<stdio.h>
int main()
{
int a = 0;
printf("请输入您想要输入的数字a:\n");
scanf("%d", &a);
int b = 0;
printf("请输入您想要输入的数字b:\n");
scanf("%d", &b);
int c = 0;
if (a >b)
{
while (a % b)
{
c = a % b;
a = b;
b = c;
}
printf("最小公约数是%d",b );
}
else if (a < b)
{
while (b % a)
{
c = b % a;
b = a;
a = c;
}
printf("最小公约数是%d",a );
}
else if (a == b)
{
printf("最小公约数是%d",a );
}
return 0;
}
//判断是否是素数
//偶数肯定不是素数，判断奇数
int main()
{
int i = 0;
for (i = 100; i < 200; i++)
{
int j = 0;
for (j = 2; j < i; j++)
{
if (i % j == 0)
{
break;
}
}
if (j == i)
{
printf("%d\n", i);
}
}
return 0;
}
//找一个数组中的最大数
int main()
{
int arr1[] = {
1,2,3,4,1005,6,7,86,34,12,44,675 };
//我先创建一个非常简单的数组
int sz = sizeof(arr1) / sizeof(arr1[0]);
int right = sz - 1;
int left = 0;
int a = arr1[left];
while (left <= right)
{
if (arr1[left] > a)
{
a = arr1[left];
}
left++;
}
printf("最大值是:%d", a);
return 0;
}
//输出简易九九乘法口诀表
int main()
{
int i = 0;
int j = 0;
for (i = 1;i <= 9;i++)
{
for (j = 1;j <= i;j++)
{
printf("%dx%d=%d ", i, j, i * j);
}
printf("\n");
}
return 0;
}
//猜数字游戏
#include<stdio.h>
#include<time.h>
//由系统给出指定的随机值
void menu()
{
printf("*********************\n");
printf("*1.开始*****0.结束***\n");
printf("*********************\n");
}
void game()
{
int ret = 0;
int guess = 0;
ret = rand() % 100 + 1;
while (1)
{
printf("请输入您猜测的数字的数字：\n");
scanf("%d", &guess);
if (guess < ret)
{
printf("您输入的太小了");
}
else if (guess > ret)
{
printf("您输入的数字大了");
}
else
{
printf("恭喜你猜对啦");
break;
}
}
}
int main()
{
int input = 0;
srand((unsigned int)time(NULL));
do
{
menu();
scanf("%d", &input);
switch (input)
{
case 1: game();
break;
case 0:
printf("游戏结束\n");
break;
default:
printf("输入非法\n");
break;
}
} while (input);
return 0;
}