*

从两边往中间靠
#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include <Windows.h>
#include <stdlib.h>

int main()
{
	char arr1[] = "The world is too dangerous";
	char arr2[] = "                          ";
	int left = 0;
	int right = sizeof(arr1) / sizeof(arr1[0]) - 2;
	//-2的原因是因为字符串最后收尾是\0，而这个\0也算一个底数
	while (left < right)
	{
		arr2[left] = arr1[left];
		arr2[right] = arr1[right];
		printf("%s\n", arr2);
		Sleep(1000);
		system("cls");
		left++;
		right--;
	}
	printf("%s\n", arr2);
	return 0;
}


一个一个打出来
#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include <Windows.h>
#include <stdlib.h>

int main()
{
	char arr1[] =  "The world is too dangerous" ;
	char arr2[] =  "                          " ;
	int zs = sizeof(arr1) / sizeof(arr1[0]);
	int left = 0;
	int right = zs - 2;
	int num1 = sizeof(arr1)-1;
	while (left < num1)
	{
		arr2[left] = arr1[left];
		
		printf("%s\n", arr2);
		Sleep(100);
		system("cls");
		left++;
	}
	printf("%s\n", arr2);
	return 0;
}