拉窗帘函数（动态打印字符串）

 1 #include<Windows.h>
 2 #include<stdio.h>
 3 #include<stdlib.h>
 4 #include<string.h>
 5 
 6 int main(){
 7 
 8     char cartain[] = "I really very love you!";
 9     char cartain1[] = "***********************";
10     int i;
11     int j=0;
12     printf("**********************\n");
13     /*printf("%d\n", strlen(cartain));
14     printf("%d\n", strlen(cartain1));*/
15     /*22*/
16     i = sizeof(cartain) / sizeof(cartain[0])-1;
17     /*i = strlen(cartain);*/
18     /*23,用sizeof计算字符串长度包含\0*/
19     while(j<i){
20         
21         cartain1[j] = cartain[j];
22         cartain1[i] = cartain[i];
23         Sleep(100);
24         printf("%s\n", cartain1);
25         
26         i--;
27         j++;
28         
29     }
30     /*printf("%d\n", cartain[i]);*/
31     
32     system("pause");
33     return 0;
34 }

//用windows函数库

//sleep（300）