空心三角形

 1 #include <stdio.h>
 2 
 3 int main(){
 4     int n;
 5     char c;
 6     int length;
 7     int flag[100][100];
 8     int i;
 9     int j;
10     int a;
11     int b;
12     int temp;
13     int print;
14     
15     print=0;
16     
17     while(1){
18         scanf("%c",&c);
19         
20         if(c==‘@‘)
21             break;
22             
23         if(print==1)
24             printf("\n");
25             
26         scanf("%d",&n);
27         getchar();
28         length=2*n-1;
29         
30         for(i=0;i<100;i++){
31             for(j=0;j<100;j++){
32                 flag[i][j]=0;
33             }
34         }
35         
36         a=0;
37         b=length-1;
38         for(i=n-1;i>=0;i--){
39             flag[i][a]=1;
40             flag[i][b]=1;
41             a++;
42             b--;
43         }
44         
45         for(j=0;j<length;j++){
46             flag[n-1][j]=1;
47         }
48         
49         temp=n;
50         print=1;
51         for(i=0;i<n;i++){
52             for(j=0;j<temp;j++){
53                 if(flag[i][j]==1)
54                     printf("%c",c);
55                     
56                 else
57                     printf(" ");
58             }
59             printf("\n");
60             temp++;
61         }
62     }
63     return 0;
64 }