自学C语言的第五天

今天差不多把鹏哥的分支和循环学完了。题目还剩一点明天继续。

照例贴一下代码。

int main()
{
	int a = getchar();
	putchar(a);
	return 0;
}

int main()
{
	int a = 0;
	while ((a = getchar()) != EOF)
		putchar(a);
	return 0;
}

int main()
{
	char password[20] = { 0 };
	printf("请输入密码");
	scanf("%s", password);
	int b = 0;
	while ((b = getchar()) != '\n')
	{
		;
	}
	
	printf("请确认密码");
	int c = getchar();
	if (c == 'y')
		printf("确认成功\n");
	else
		printf("确认失败\n");
	return 0;

}

int main()
{
	int a = 0;
	while ((a = getchar()) != EOF)
	{
		if (a < '0' || a>'9')
			continue;
		putchar(a);
	}
	return 0;
}

int main()
{
	int i = 0;
	for (i = 1; i <= 10; i++)
	{
		if (i == 5)
			continue;
		printf("%d ", i);
	}
	return 0;
}

int main()
{
	int a = 0;
	int b = 0;
	for (a=0,b=0; b=0; a++,b++)
	{
		
		printf("%d\n",a);
		printf("%d\n", b);
		b++;
	}
	return 0;
}

int main()
{
	int a = 1;
	do
	{
		if (a == 5)
			continue;
		printf("%d ", a);
		a++;
	} while (a <= 10);
	return 0;
}

int main()
{
	int n = 0;
	int m = 0;
	int x = 1;
	scanf("%d", &m);
	for (n = 1; n <= m;n++)
	{
		x *= n;
		
	}
	printf("%d", x);
	return 0;
}

int main()
{
	int x = 0;
	int y = 1;
	int n = 0;
	
	for (x = 1;x <= 10; x++)
	{
		y *= x;
		n += y;
	  
	}
	printf("%d",n);

	return 0;
}

int main()
{
	int arr[] = { 1,2,3,4,5,6,7,8,9,10 };
	int k = 0;
	scanf("%d", &k);
	int sz = sizeof(arr) / sizeof(arr[0]);
	int left = 0;
	int right = sz - 1;
	while (left <= right)
	{
		int mid = (right + left) / 2;
		if (arr[k] > mid)
		{
			left = mid + 1;
		}
		else if (arr[k] < mid)
		{
			right = mid - 1;
		}
		else
		{
			printf("找到了下标为：%d", mid);
			break;

		}
	}
	if (left > right)
		printf("找不到");
	return 0;