# 二次元配列の宣言�B

a=[
    [ 1 , 2 , 3 ] ,
    [ 4 , 5 , 6 ] ,
    [ 7 , 8 , 9 ]
]
p a

# 二次元配列の要素の参照�A

a=[
    [ 1 , 2 , 3 ] ,
    [ 4 , 5 , 6 ] ,
    [ 7 , 8 , 9 ]
]

p a[ 0 ][ 0 ]
p a[ 0 ][ 1 ]
p a[ 0 ][ 2 ]

p a[ 1 ][ 0 ]
p a[ 1 ][ 1 ]
p a[ 1 ][ 2 ]

p a[ 2 ][ 0 ]
p a[ 2 ][ 1 ]
p a[ 2 ][ 2 ]

# 二次元配列の要素の参照�C

a=[
    [ 1 , 2 , 3 ] ,
    [ 4 , 5 , 6 ] ,
    [ 7 , 8 , 9 ]
]

p a[ 0 ]
p a[ 1 ]
p a[ 2 ]

# 二次元配列の要素の参照�D

a=[
    [ 1 , 2 , 3 ] ,
    [ 4 , 5 , 6 ] ,
    [ 7 , 8 , 9 ]
]

p a.length
p a[ 0 ].length
p a[ 1 ].length
p a[ 2 ].length

# 二次元配列の要素の参照�D'
a=[
    [ 1 ] ,
    [ 4 , 5 ] ,
    [ 7 , 8 , 9 ]
]

p a.length
p a[ 0 ].length
p a[ 1 ].length
p a[ 2 ].length

# 二次元配列の要素への代入

a = Array.new( 4 )

a[ 0 ] = Array.new( 3 )
a[ 1 ] = Array.new( 3 )
a[ 2 ] = Array.new( 3 )
a[ 3 ] = Array.new( 3 )

a[ 0 ][ 0 ] = 1
a[ 0 ][ 1 ] = 2
a[ 0 ][ 2 ] = 3
a[ 1 ][ 0 ] = 4
a[ 1 ][ 1 ] = 5
a[ 1 ][ 2 ] = 6
a[ 2 ][ 0 ] = 7
a[ 2 ][ 1 ] = 8
a[ 2 ][ 2 ] = 9
a[ 3 ][ 0 ] = 10
a[ 3 ][ 1 ] = 11
a[ 3 ][ 2 ] = 12

p a

# 二次元配列の宣言�B
a = []

a[ 0 ] = []
a[ 0 ][ 0 ] = 1
a[ 0 ][ 1 ] = 2
a[ 0 ][ 2 ] = 3

a[ 1 ] = []
a[ 1 ][ 0 ] = 4
a[ 1 ][ 1 ] = 5
a[ 1 ][ 2 ] = 6

a[ 2 ] = []
a[ 2 ][ 0 ] = 7
a[ 2 ][ 1 ] = 8
a[ 2 ][ 2 ] = 9

a[ 3 ] = []
a[ 3 ][ 0 ] = 10
a[ 3 ][ 1 ] = 11
a[ 3 ][ 2 ] = 12

p a

# 二重ループ（復習）

4.times{ |i|
    3.times{ |j|
		print( i , " + " , j , " = " , i + j , "\n" )
    }
}

# 二次元配列の要素の参照�@

a=[
    [ 1 , 2 , 3 ] ,
    [ 4 , 5 , 6 ] ,
    [ 7 , 8 , 9 ] ,
    [ 10 , 11 , 12 ]
]

4.times{ |i|
    3.times{ |j|
	  print( " a[ " , i , " ][ " , j , " ] = " , 
		a[ i ][ j ] , "\n" )
    }
}	

# 二次元配列の要素の参照�@'

a=[
    [ 1 , 2 , 3 ] ,
    [ 4 , 5 , 6 ] ,
    [ 7 , 8 , 9 ] ,
    [ 10 , 11 , 12 ]
]

3.times{ |i|
    4.times{ |j|
	  print( " a[ " , j , " ][ " , i , " ] = " , 
		a[ j ][ i ] , "\n" )
    }
}	

# 二次元配列の要素の参照�A

a=[
    [ 1 , 2 , 3 ] ,
    [ 4 , 5 , 6 ] ,
    [ 7 , 8 , 9 ] ,
    [ 10 , 11 , 12 ]
]

a.length.times{ |i|
    a[ i ].length.times{ |j|
	  print( " a[ " , i , " ][ " , j , " ] = " , 
		a[ i ][ j ] , "\n" )
    }
}

# 二次元配列の要素の参照�B
a=[
    [ 1 , 2 , 3 ] ,
    [ 4 , 5 , 6 ] ,
    [ 7 , 8 , 9 ] ,
    [ 10 , 11 , 12 ]
]

(0..a.length-1).each{ |i|
    (0..a[ i ].length-1).each{ |j|
	  print( " a[ " , i , " ][ " , j , " ] = " , 
		a[ i ][ j ] , "\n" )
    }
}	

# 二次元配列の要素の参照�C''

a=[
    [ 1 , 2 , 3 ] ,
    [ 4 , 5 , 6 ] ,
    [ 7 , 8 , 9 ] ,
    [ 10 , 11 , 12 ]
]

a.each{ |i|
    p  i
    i.each{ |j|
    	    print( j , "\n" )
    }
}

# 二次元配列の要素の参照�D
a = [
   [ 1 ],
   [ 2, 3 ],
   [ 4, 5, 6],
   [ 7, 8, 9, 10]
]

a.length.times{ |i|
    a[ i ].length.times{ |j|
	print( " a[ " , i , " ][ " , j , " ] = " , a[ i ][ j ] , "\n" )
    }
}	

# 二次元配列の要素の参照�D'
a = [
   [ 1 ],
   [ 2, 3 ],
   [ 4, 5, 6],
   [ 7, 8, 9, 10]
]

a.each{ |i|
    p  i
    p  i.length
}	

# 二次元配列の要素の参照�D''
a = [
   [ 1 ],
   [ 2, 3 ],
   [ 4, 5, 6],
   [ 7, 8, 9, 10]
]

# 二次元配列の要素の参照�D'''
a.each{ |i|
    i.length.times{ |j|
	　　print( i[ j ] , "\n" )
    }
}	

a = [
   [ 1 ],
   [ 2, 3 ],
   [ 4, 5, 6],
   [ 7, 8, 9, 10]
]

a.each{ |i|
    i.each{ |j|
	　　print( j , "\n" )
    }
}	

# 二次元配列の要素への代入�@
a=[]

a[ 0 ] = Array.new( 3 )
a[ 1 ] = Array.new( 3 )
a[ 2 ] = Array.new( 3 )

count = 1
3.times{ |i|
    3.times{ |j|
	  a[ i ][ j ] = count
	  count += 1
    }
}	

p a

# 二次元配列の要素への代入�@'

a=[]

3.times{ |i|
  a[ i ] = Array.new( 3 )
}

count = 1
3.times{ |i|
    3.times{ |j|
	  a[ i ][ j ] = count
	  count += 1
    }
}	
p a

a=[]

count = 1
3.times{ |i|
    a[ i ] = []
    3.times{ |j|
	  a[ i ][ j ] = count
	  count += 1
    }
}	
p a

# 二次元配列の要素への代入�@''
a=[]

count = 1
3.times{ |i|
    a[ i ] = []
    3.times{ |j|
	  a[ i ][ j ] = count
	  count += 1
    }
}	

p a

# 二次元配列の要素への代入�A
a=[]

(0..2).each{ |i|
    a[ i ] = []
    (0..2).each{ |j|
	  a[ i ][ j ] = rand( 10 )
    }
}	

p a

# 二次元配列の要素への代入�B
a=[1,2,3]

b=[]
3.times{ |i|
    b[ i ] = []
    3.times{ |j|
	   b[ i ][ j ] = a[ j ]  
    }
}	

p b

# 二次元配列の要素への代入�C
a=[1,2,3]

b=[]
3.times{ |i|
    b[ i ] = []
    b[ i ] = a
}	

p b

# 二次元配列の要素への代入�C'
a=[1,2,3]

b=[]
3.times{ |i|
    b[ i ] = []
    b[ i ] = a
}	

p b

a[0]=100
p b

# 二次元配列の要素への代入�D
a=[]
3.times{ |i|
    a[ i ] = []
    3.times{ |j|
	a[ i ][ j ] = gets.chomp.to_i
   }
}

p a

# 二次元配列のコピー�@
a=[
    [ 1 , 2 , 3 ] ,
    [ 4 , 5 , 6 ] ,
    [ 7 , 8 , 9 ] ,
    [ 10 , 11 , 12 ]
]

b = []
a.length.times{ |i|
    b[ i ] = []
    a[ i ].length.times{ |j|
	　　b[ i ][ j ] = a[ i ][ j ]
    }
}	

p b

# 二次元配列のコピー�@'
a=[
    [ 1 , 2 , 3 ] ,
    [ 4 , 5 , 6 ] ,
    [ 7 , 8 , 9 ] ,
    [ 10 , 11 , 12 ]
]

b = []
a.length.times{ |i|
    b[ i ] = []
    b[ i ] = a[ i ]
}	

p b

# ファイルからの読み込み�@
# coding: Windows-31J
open( "HumptyDumpty.txt" ) { |f|
	ln = 1; l = f.gets
	while !(l.nil?) do
	print( ln, "行目:", l )
		ln += 1; l = f.gets
	end
}

# ファイルからの読み込み�B
open("HumptyDumpty.txt") { |f|
	while line = f.gets  do
		puts( line )
	end
}

# ファイルからの読み込み�C
# coding: Windows-31J
sum = 0
open( "file.txt" ) { |f|
	while line = f.gets  do
		x = line.chomp.to_i
		print( x , " " )
		sum += x
	end
	print( "\n 合計：" , sum )
}

# ファイルからの読み込み�D
# coding: Windows-31J
sum = 0
x =[]
open( "file1.txt" ) { |f|
	while line = f.gets  do
		x = line.chomp.split(/,/)
		print( x[ 0 ] , " " , x[ 1 ] , "\n" )
		sum += x[ 1 ].to_i
	end
	print( "\n 合計：" , sum )
}

# ファイルへの書き込み�@
f = open( "text.txt" , "w" )
10.times{ |i|
	f.print( i , "\n" )
}
f.close

# ファイルへの書き込み�B
s = open( "text.txt" , "w" )
open("HumptyDumpty.txt") { |f|
	while line = f.gets  do
		s.print( line )
	end
}
s.close