【初识C语言】C语言基础练习 (四)

13.创建函数比较两个整数的大小

#include 
int Max(int x, int y)
{
	if (x > y)
	{
		return x;
	}
	else
	{
		return y;
	}
}
int main()
{
	int a = 0;
	int b = 0;
	printf("请输入两个整数");
	scanf_s("%d %d", &a, &b);
	int m = Max(a, b);
	printf("%dn", m);
	return 0;
}

14 求出0～999之间的所有“水仙花数”并输出。

#include 
int main()
{
	int a = 0;
	int b = 0;
	int c = 0;
	int sum = 0;
	for (a = 0; a <= 9; a++)
	{
		for (b = 0; b <= 9; b++)
		{
			for (c = 0; c <= 9; c++)
			{
				sum = 100 * a + 10 * b + c;
				if (sum ==a * a * a + b * b * b + c * c * c)
				{
					printf("%dn", sum);
				}
			}
		}
	}
	return 0;
}

15 求Sn=a+aa+aaa+aaaa+aaaaa的前5项之和，其中a是一个数字，

#include 
int main()
{
	int a = 0;
	int sum = 0;
	printf("请输入数字n");
	scanf_s("%d", &a);
	sum = a + (a * 10 + a) + (a * 100 + a * 10 + a) + (a * 1000 + a * 100 + a * 10 + a) + (a * 10000 + a * 1000 + a * 100 + a * 10 + a);
	printf("%d", sum);
	return 0;
}