C language programming topics eleven to fifteen

①C language programming topics eleven

Fibonacci number

#include <stdio.h>
#include <stdlib.h>

int main()
{
	int i, n, t1 = 0, t2 = 1, nextTerm;
	printf("输出几项:");
	scanf("%d", &n);
	printf("斐波那契数列：");
	for (i = 0; i < n; i++)
	{
		printf(" %d", t1);
		nextTerm = t1 + t2;
		t1 = t2;
		t2 = nextTerm;
	}
	system("pause");
	return 0;
}

②C language programming topics twelve

Find the greatest common divisor of two numbers

#include <stdio.h>
#include <stdlib.h>

int main()
{
	int n1, n2, i, gcd;
	printf("请输入两个正整数：");
	scanf("%d %d", &n1, &n2);
	for (i = 1; i <= n1 && i <= n2; i++)
	{
		if (n1%i == 0 && n2%i == 0)
		{
			gcd = i;
		}
	}
	printf("%d和%d的最大公约数是%d\n", n1, n2, gcd);
	system("pause");
	return 0;
}

③C language programming topics thirteen

Find the least common multiple of two numbers

#include <stdio.h>
#include <stdlib.h>

int main()
{
	int n1, n2, minMultiple;
	printf("请输入两个正整数：");
	scanf("%d %d", &n1, &n2);
	//判断两数较大的值，并赋值给minMultiple
	minMultiple = (n1 > n2) ? n1 : n2;
	while (1)
	{
		if (minMultiple%n1 == 0 && minMultiple%n2 == 0)
		{
			printf("%d和%d的最小公倍数为%d\n", n1, n2, minMultiple);
			break;
		}
		minMultiple++;
	}
	system("pause");
	return 0;
}

④C language programming topics fourteen

factorial

#include <stdio.h>
#include <stdlib.h>

int main()
{
	unsigned int n, i, factorial=1;
	printf("请输入一个正整数：");
	scanf("%d", &n);
	for (i = 1; i <= n; i++)
	{
		factorial *= i;
	}
	printf("%d!=%d\n", n, factorial);
	system("pause");
	return 0;
}

⑤C language programming topics fifteen

Several figures for the number of judges

#include <stdio.h>
#include <stdlib.h>

int main()
{
	long long n;
	int count = 0;
	printf("请输入一个整数:");
	scanf("%lld", &n);
	while (n != 0)
	{
		n /= 10;
		count++;
	}
	printf("数字是%d位数\n", count);
	system("pause");
	return 0;
}