2021-10-24

#include
#pragma warning(disable:4996)

int main()
{
	int a;
	scanf("%d", &a);
	printf("n");
	for (int i = 0; i <= a; i++)
	{
		if (i % 2 == 0)                //输出奇数将条件改为i % 2 != 0
		{
			printf("%dn", i);
		}
	}
}

#include
#pragma warning(disable:4996)


int main()
{
	char ch1;
	int a;
	int b;
	printf("请输入一个字符:");
	scanf("%c", &ch1);
	
	a = (ch1 == 'a' || ch1 == 'e' || ch1 == 'i' || ch1 == 'o' || ch1 == 'u');
	b = (ch1 == 'A' || ch1 == 'E' || ch1 == 'I' || ch1 == 'O' || ch1 == 'U');
	
	
	if ( a ||  b)
	{
		printf("是元音");
	}
	else 
		printf("不是元音");

}

#include
#pragma warning(disable:4996)

int main()
{
	char i;
	printf("请输入一个字符");
	scanf("%c", &i);
	int a, b;
	a = (i >= 'a' && i <= 'z');
	b = (i >= 'A' && i <= 'Z');
	if (a || b)
		printf("是字母");
	else
		printf("不是字母");
	return 0;
}

#include
#pragma warning(disable:4996)

int main()
{
	int a, b = 0, c = 0, i = 0;
	scanf("%d", &a);
	while (i < a)
	{
		i++;
		c += 1;
		b = b + c;
	}
	printf("%dn", b);
}

#include
#pragma warning(disable:4996)

int main()
{
	int a, b, c, d, e;
	scanf("%d%d", &a, &b);
	if (a > b)
	{
		c = a % b;
		if (c == 0) printf("最大公约数是 % dn", b);
		while(c != 0)
		{
			d = c;				//辗转相除法
			c = b % c;			//需要一个临时变量来储存上一次过程的除数
			b = d;
			if (c == 0)		
			{
				printf("最大公约数是%dn", b);
			}
		}
	}

	else if(a == b)	printf("最大公约数是 % dn", a);

	else
	{
		c = b % a;
		if (c == 0) printf("最大公约数是 % dn", a);
		while (c != 0)
		{
			d = c;
			c = a % c;
			a = d;
			if (c == 0)
			{
				printf("最大公约数是%dn", a);
			}
		}
	}
}