1: /* stair11.c */
 2: #include<stdio.h>
 3: 
 4: int main( void ){
 5: 
 6:   /* 変数の宣言 */
 7:   int n;
 8: 
 9:   /* カウンタ用変数の宣言 */
10:   int i, j;
11: 
12:   /* scanf 関数で整数を入力 */
13:   printf( "正の整数を入力してください----- " );
14:   scanf( "%d", &n );
15:   printf( "%d 段の階段です\n\n", n );
16: 
17:   /* n 段の階段をを作画 */
18:   for ( i = 1; i < n + 1; i = i + 1 ) {
19: 
20:     /* 左側の空白 */
21:     for ( j = 1; j < n - i + 1; j = j + 1 ) {
22: 
23:       printf( " " );
24:     }
25:     
26:     /* 階段 */
27:     for ( j = 1; j < i + 1; j = j + 1 ) {
28: 
29:       printf( "*" );
30: 
31:     }
32: 
33:     /* 改行 */
34:     printf( "\n" );
35:     
36:   }
37: 
38:   /* 改行 */
39:   printf( "\n" );
40: 
41:   return 0;
42:   
43: }