从两端逐渐显现字符串

#define _CRT_SECURE_NO_WARNINGS

#include<stdio.h>
#include<string.h>
#include<windows.h>
#include<stdlib.h>
 //从两端逐渐显现字符串
int main() {
	char ch1[] = "You don't know what you mean to me.";
	char ch2[] = "                                                    ";
	int left = 0;
	int right = strlen(ch1) - 1;
	while (right >= left) {
		ch2[left] = ch1[left];
		ch2[right] = ch1[right];
		printf("%s\n", ch2);
		Sleep(80);
		system("cls");
		left++;
		right--;
	}
	printf("%s\n", ch1);
	return 0;
}