C语言的循环小练习详解

沃梦达教程 C/C++开发

2023-02-06

1.实现n的阶乘

int main()
{
	int n = 0;
	printf("请输入n：");
	scanf("%d", &n);
	int i = 0;
	int ret = 1;
	for (i = 1; i <= n; i++)
	{
		ret *= i;
	}
	printf("%d", ret);
	return 0;
}

2.计算1！+2！+3！+...+10！的结果

int main()
{
	int n = 10;
	int i = 0;
	int ret = 1;
	int sum = 0;
	for (i = 1; i <= n; i++)
	{
		ret *= i;
		sum += ret;
	}
	printf("%d", sum);
	return 0;
}

3.两端向中间汇聚打印：

例如：I Love China !!!!!!!

和 ####################

每次左边右边一个‘#’变成第一行，代码如下：

#include<stdio.h>
#include<string.h>
int main()
{
	char arr1[] = "I Love China !!!!!!!";
	char arr2[] = "####################";
	int length = strlen(arr1);
 
	int left = 0;
	int right = length - 1;
 
	while (left < right)
	{
		arr2[left] = arr1[left];
		arr2[right] = arr1[right];
		printf("%s\n", arr2);
		left++;
		right--;
	}
	return 0;
}

程序运行结果：